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here i is

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 8/30/14 7:47 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/network/rcon/RConThreadClient
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:694)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:288)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:527)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:815)
at net.minecraft.client.main.Main.main(SourceFile:103)
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:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/network/rcon/RConThreadClient
at com.thevoxelbox.voxelmap.ClientProxy.postInit(ClientProxy.java:15)
at com.thevoxelbox.voxelmap.VoxelMapMod.postInit(VoxelMapMod.java:37)
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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:693)
... 10 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.network.rcon.RConThreadClient
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 38 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180)
... 40 more


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

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 218658400 bytes (208 MB) / 422854656 bytes (403 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.03 FML v7.2.217.1147 Minecraft Forge 10.12.2.1147 33 mods loaded, 33 mods active
mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
FML{7.2.217.1147} [Forge Mod Loader] (forge-1.7.2-10.12.2.1147.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Forge{10.12.2.1147} [Minecraft Forge] (forge-1.7.2-10.12.2.1147.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
CodeChickenCore{1.0.2.10} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
NotEnoughItems{1.0.2.14} [Not Enough Items] (NotEnoughItems-1.7.2-1.0.2.14-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
lucky{5.1.0} [Lucky Block] ([1-7-2]_Lucky_Block_v5-1-0.jar(1).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
FLabsBF{4.1.1} [Better Furnaces] ([1.7.2]Better_Furnaces_V4.1.1.jar.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
bspkrsCore{6.11} [bspkrsCore] ([1.7.2]bspkrsCore-universal-6.11.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Treecapitator{1.7.2} [Treecapitator] ([1.7.2]Treecapitator-universal-2.0.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Backpack{2.0.0} [Backpack] (backpack-2.0.0-1.7.x.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
AWWayofTime{v1.0.2} [Blood Magic: Alchemical Wizardry] (Blood Magic-v1.1.0(1.7.2).jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Core{6.0.16} [BuildCraft] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Builders{6.0.16} [BC Builders] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Energy{6.0.16} [BC Energy] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Factory{6.0.16} [BC Factory] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Transport{6.0.16} [BC Transport] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
BuildCraft|Silicon{6.0.16} [BC Silicon] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
MoCreatures{6.2.1} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v6.2.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
EnderStorage{1.4.4.8} [EnderStorage] (EnderStorage-1.7.2-1.4.4.8-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Baubles{1.0.0.13} [Baubles] (Baubles-1.7.2-1.0.0.13.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
ExtraUtilities{1.1.0b} [Extra Utilities] (extrautilities-1.1.0b.jar.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
flansmod{4.3.0} [Flan's Mod] (Flans Mod-1.7.2-4.3.0.jar.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
FoodPlus{3.0rS} [§bFood Plus] (FoodPlus-1.7.2-3.0rS.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
mod.ymt.air.HariboteAirCraft{172v2 hiten} [HariboteAirCraft] (HariboteAirCraft_172v2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
iChunUtil{3.3.0} [iChunUtil] (iChunUtil-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Hats{3.0.1} [Hats] (Hats-3.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
IronChest{6.0.36.725} [Iron Chest] (ironchest-1.7.2-6.0.36.725-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
JABBA{1.1.4} [JABBA] (Jabba-1.1.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
meteors{2.12} [Falling Meteors] (meteors-1.7.2-2.12.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Morph{0.8.1} [Morph] (Morph-Beta-0.8.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Thaumcraft{4.1.1.14} [Thaumcraft] (Thaumcraft-1.7.2-4.1.1.14.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
voxelmap{1.7.2} [VoxelMap] (voxelmap-1.7.2-1.0.jar.zip) Unloaded->Constructed->Pre-initialized->Initialized->Errored
witchery{0.20.5} [Witchery] (witchery-1.7.2-0.20.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized

Hmm. That is a strange error. You might need to tell us what happened in getting this error mesage.. This will help us know how to help you fix it.

all it does is i try to load minecraft and boom it crashes

Do you have all of the dependancies installed for your mods? Also, what packs do you have for Flans? Try deleting the packs for flans and say what happens.

As 3dsboy08's stating, this could be a mod issue. You see, if too many mods are loaded onto one game then it could cause the client to crash because it cannot handle all of the memory being added to it. This could also be a lot of other errors, but you should try that first.

If you don't have mods. Respond to us and tell us so that we know.