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Ive Opened MC on my SP World And Instead Of Entering to the world it crashed. help me fix it , it will be very appriciated if you do.
here is the crash report :
---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 16:39 30/01/14
Description: Updating screen events

java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityOtherPlayerMP
at net.minecraft.client.Minecraft.continueWorldLoading(Minecraft.java:2047)
at cpw.mods.fml.client.FMLClientHandler.callbackIdDifferenceResponse(FMLClientHandler.java:514)
at cpw.mods.fml.client.GuiIdMismatchScreen.func_73878_a(GuiIdMismatchScreen.java:55)
at net.minecraft.client.gui.GuiYesNo.func_73875_a(SourceFile:39)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:142)
at net.minecraft.client.gui.GuiScreen.func_73867_d(GuiScreen.java:240)
at net.minecraft.client.gui.GuiScreen.func_73862_m(GuiScreen.java:208)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1564)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:908)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:836)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityOtherPlayerMP
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:94)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 17 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.client.Minecraft.continueWorldLoading(Minecraft.java:2047)
at cpw.mods.fml.client.FMLClientHandler.callbackIdDifferenceResponse(FMLClientHandler.java:514)
at cpw.mods.fml.client.GuiIdMismatchScreen.func_73878_a(GuiIdMismatchScreen.java:55)
at net.minecraft.client.gui.GuiYesNo.func_73875_a(SourceFile:39)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:142)
at net.minecraft.client.gui.GuiScreen.func_73867_d(GuiScreen.java:240)
at net.minecraft.client.gui.GuiScreen.func_73862_m(GuiScreen.java:208)

-- Affected screen --
Details:
Screen name: net.minecraft.client.gui.GuiMainMenu
Stacktrace:
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1564)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:908)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:836)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 245149432 bytes (233 MB) / 482213888 bytes (459 MB) up to 969408512 bytes (924 MB)
JVM Flags: 1 total; -Xmx1040m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v8.04 FML v6.2.62.871 Minecraft Forge 9.10.1.871 Optifine OptiFine_1.6.2_HD_U_C4 89 mods loaded, 89 mods active
mcp{8.04} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.2.62.871} [Forge Mod Loader] (minecraftforge-1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.10.1.871} [Minecraft Forge] (minecraftforge-1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BetterSprinting{v10} [Better Sprinting Coremod] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CodeChickenCore{0.9.0.5} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NotEnoughItems{1.6.1.4} [Not Enough Items] (NotEnoughItems 1.6.1.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
shadersmod{2.0.1 beta 18} [GLSL Shaders Mod] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FamiliarsAPI{1.6.2} [Familiars API] (Familiars_API_1.6.2c.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
battlegear2{1.0.2} [Mine & Blade Battlegear 2 - Warcry] (1.6.2-MB_Battlegear2-Warcry-1.0.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod{2.9.2.3} [Damage Indicators] (1.6.4 DamageIndicatorsv2.9.2.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CrazyOres{CrazyOres Core 1.0} [CrazyOres Core] ([1.6.2] CrazyOres Core V1.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Doggy Talents{v1.4.0} [Doggy Talents] ([1.6.2] Doggy Talents - v1.4.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
bspkrsCore{v4.3(1.6.2)} [bspkrsCore] ([1.6.2]bspkrsCorev4.3.FORGE_ONLY.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_bspkrsCore{v4.3(1.6.2)} [bspkrsCore] ([1.6.2]bspkrsCorev4.3.FORGE_ONLY.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_ArmorStatusHUD{v1.13(1.6.2)} [ArmorStatusHUD] ([1.6.2]ArmorStatusHUDv1.13.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BetterFurnaces{3.3} [Better Furnaces] ([1.6.2]BetterFurnacesV3.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
craftableAnimals{2.3} [Craftable Animals] ([1.6.2]CraftableAnimals v2.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CustomSpawner{2.3.1} [DrZhark's CustomSpawner] (CustomMobSpawner 2.3.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MoCreatures{6.0.1} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v6.0.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
craftableMoCreature{1.0.4} [CraftableAnimals MoCreature extension] ([1.6.2]CraftableAnimals MoCreature Extension v1.0.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mB{1.1.3} [myBiome] ([1.6.2]myBiome - Release v1.1.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_ReiMinimap{v3.4_01 [1.6.2]} [mod_ReiMinimap] ([1.6.2]ReiMinimap_v3.4_01.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
cfm{3.1} [§4MrCrayfish's Furniture Mod] ([Forge]FurnitureModv3.1.1(1.6.2).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
nohero_morehealth{4.5} [More Health Forge] ([Forge]More Health Enhanced 4.5 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_MOreTrees{1.2} [M-Ore Trees] (_1.6.2_M-OreTrees_v1.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_Invedit{version 1.16 by mister_person} [mod_Invedit] (All-U-Want inventory editor 1.16a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_AnimalBikes{1.0} [mod_AnimalBikes] (AnimalBikes 1.6.2 Modloader.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AnimationAPI{1.1.1} [AnimationAPI] (AnimationAPI v1.1.1 mc1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ArchimedesShipsMod{1.6.2 v1.3.6} [Archimedes' Ships] (ArchimedesShips v1.3.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
amm{2.0} [ArmorMovementMod] (ArmorMovement 1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Backpack{1.18.17} [Backpack] (backpack-1.18.17-1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BattleTowers{1.4.1} [Battle Towers] (BattleTowers_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BiblioCraft{1.4.0} [BiblioCraft] (BiblioCraft[v1.4.0].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CyanSwords{1.7.0} [Cyan Warrior Swords] (Cyan_Warriors_Sword_1.7.0a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Dirtbike{v1.1.1} [Dirtbike Mod] (Dirtbike Mod - v1.1.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights{1.2.5} [Dynamic Lights] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_onFire{1.0.2} [Dynamic Lights on burning] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_creepers{1.0.2} [Dynamic Lights on Creepers] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_dropItems{1.0.4} [Dynamic Lights on ItemEntities] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_mobEquipment{1.0.1} [Dynamic Lights on Mob Equipment] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_flameArrows{1.0.0} [Dynamic Lights on Flame enchanted Arrows] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_otherPlayers{1.0.4} [Dynamic Lights Other Player Light] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_thePlayer{1.0.8} [Dynamic Lights Player Light] (DynamicLights_1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ElementalOrbs{1.1} [Elemental Orbs Mod] (Elemental Orbs v1.1 for Minecraft 1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
eplus{1.16.5b} [Enchanting Plus] (EnchantingPlus-1.16.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FamiliarsDefaultMobPack{1.6.2} [Familiars DefaultMobPack] (Familiars_DefaultMobPack_1.6.2a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FamiliarsExtendedFamPack{1.6.2} [Familiars ExtendedFamPack] (Familiars_ExtendedFamPack_1.6.2a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FamiliarsHerobrineFamPack{1.6.2} [Familiars HerobrineFamPack] (Familiars_HerobrineFamPack_1.6.2a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FerullosMods{2.8.5} [Ferullo's Mods] (Ferullos Guns Mod 2.9.0 MC 1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
iChunUtil{2.4.0} [iChunUtil] (util^iChunUtil2.4.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Grinder{2.0.0} [Grinder] (files^AttachableGrinder2.0.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
GraviGun{2.0.0} [GraviGun] (files^GravityGun2.0.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Morph{0.4.0} [Morph] (files^Morph-Beta-0.4.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Torched{2.0.0} [Torched] (files^Torched2.0.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FinderCompass{1.6.2B} [Finder Compass] (FinderCompass_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NBTEdit{1.6.2.0} [In-game NBTEdit] (Forge_NBTEditv1.6.2.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Hats{2.1.1} [Hats] (Hats2.1.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
HatStand{2.1.0} [HatStand] (HatStand2.1.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
instantblocks{1.4.7} [Instant Blocks] (InstantBlocks_v1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
inventorytweaks{1.56} [Inventory Tweaks] (InventoryTweaks-MC1.6.2-1.56-b77.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mcheli{0.6.0} [mcheli] (mcheli) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mcmp1{1.2.5-MC1.6.2} [MCMP-1] (MCMP-1-1.2.5-MC1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mcmp101{1.0.0-MC1.5} [MCMP-101] (MCMP-1-1.2.5-MC1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
minegicka{1.4.1} [Minegicka 2] (Minegicka II 1.4.1 for MC1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AS_Minions{1.7.4} [Minions] (Minions_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mobLocketMod{1.6.4v0} [Mob Locket] (moblocket.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
More Bows{1.5_v1} [More Bows mod] (More bows 1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MosesMod{1.2} [Moses Mod] (mosesmod-1.2.0-mc1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MultiPageChest{1.2.4b} [Multi Page Chest] (multiPageChest-1.2.4b-universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MutantCreatures{1.4.3} [Mutant Creatures] (Mutant_Creatures_v1.4.3_mc1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
necromancy{1.4b} [Necromancy] (Necromancy-1.4b-1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ParticleMan{v1.0} [Particle Man] (Particle Man v1.4 Mod for MC v1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
PetBat{1.2.4} [Pet Bat] (PetBat_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
PR{0.0.3.7} [Plunder Rummage] (Plunder_Rummage_0.0.3.7__MC_1.6.2_.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
PortalGun{2.0.2} [PortalGun] (PortalGun2.0.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
quiverchevsky{b6} [QuiverBow] (Quiverbow_1.6.x_b6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
RedStoneHandGuns{Beta} [RedStoneGuns] (Redstone Handguns 1.6.2v2.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Super_Heroes{1.5} [Super Heroes Mod] (SHIM_5.5_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
SimplePortables{0.3} [Simple Portables] (simpleportables-0.3.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
skullforge{V1.6.2B} [SkullForge] (SkullForge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
colossali_SpiderMan{1.5.2} [Spider Man] (SpiderMan_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_villagearmy{A} [Testificate Army Mod] (Testificate-Army-Mod-A-for-Minecraft-162.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TF2Teleporter{1.6.2} [TF2 Teleporter] (TF2_Teleporter_1.6.2a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_Timber{1.6.2} [Timber!] (Timber! (1.6.2).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TooMuchTNT{2.5} [TooMuchTNT] (TooMuchTNT v2.5) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TuxWeapons{0.4c} [TuxWeapons] (TuxWeapons 0.4c.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AS_UpdateCheck{1.1.0} [AtomicStryker Update Check Mod] (UpdateCheckerMod_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
UtilityMobs{2.1} [Utility Mobs] (UtilityMobs 2.1 for MC 1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
witchery{0.13.1} [Witchery] (Witchery_0-13-1_164.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: Forge9.10.1.871
LWJGL: 2.9.0
OpenGL: GeForce GTX 650/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null