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this pops up when I have the biosphere mod on: ---- Minecraft Crash Report ----
// There are four lights!
Time: 2/8/14 8:45 AM
Description: Initializing game
java.lang.NoClassDefFoundError: BiosphereGenerator
at mod_Biosphere.load(mod_Biosphere.java:19)
at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:539)
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:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
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:201)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
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:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
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:112)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:699)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:249)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:509)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
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: BiosphereGenerator
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 34 more
Caused by: java.lang.IncompatibleClassChangeError: class BiosphereGenerator has interface net.minecraft.world.IBlockAccess as super class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:178)
... 36 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at mod_Biosphere.load(mod_Biosphere.java:19)
at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:539)
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:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
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:201)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
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:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
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:112)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:699)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:249)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:509)
-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
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: 1.6.4
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 58314832 bytes (55 MB) / 200040448 bytes (190 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
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: 0, tallocated: 0
FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 27 mods loaded, 27 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized
Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized
FamiliarsAPI{1.6.4} [Familiars API] (Familiars_API.zip) Unloaded->Constructed->Pre-initialized->Initialized
PigCompanionMod{1.6.4} [PigCompanionMod] ([1.6.4]PigCompanionMod.zip) Unloaded->Constructed->Pre-initialized->Initialized
AnimationAPI{1.1.1} [AnimationAPI] (AnimationAPI.zip) Unloaded->Constructed->Pre-initialized->Initialized
ArchimedesShipsMod{1.6.4 v1.4.5} [Archimedes' Ships] (Archimedes Ships.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_Biosphere{1.6.2} [mod_Biosphere] (Biosphere.zip) Unloaded->Constructed->Pre-initialized
DamageIndicatorsMod{2.8.7.0} [Damage Indicators] (Damage Indicators.zip) Unloaded->Constructed->Pre-initialized
EnhancedPortals3{3.0.0_Beta-4b} [EnhancedPortals] (EnhancedPortals.jar) Unloaded->Constructed->Pre-initialized
ExpChest{3.1.40.--} [Exp Chest] (Exp Chest.zip) Unloaded->Constructed->Pre-initialized
FamiliarsDefaultMobPack{1.6.4} [Familiars DefaultMobPack] (Familiars_DefaultMobPack.zip) Unloaded->Constructed->Pre-initialized
FamiliarsExtendedFamPack{1.6.4} [Familiars ExtendedFamPack] (Familiars_ExtendedFamPack.zip) Unloaded->Constructed->Pre-initialized
FamiliarsHerobrineFamPack{1.6.4} [Familiars HerobrineFamPack] (Familiars_HerobrineFamPack.zip) Unloaded->Constructed->Pre-initialized
lucky{4.2.1} [Lucky Block] (LuckyBlock.jar) Unloaded->Constructed->Pre-initialized
mochickens{1.2.1} [Mo' Chickens] (moChickens.zip) Unloaded->Constructed->Pre-initialized
mod_Xray{MX for 1.6.2} [mod_Xray] (mod_Xray.zip) Unloaded->Constructed->Pre-initialized
MoreFurnaces{1.3.5} [More Furnaces] (More Furnaces.zip) Unloaded->Constructed->Pre-initialized
Morph{0.6.0} [Morph] (Morph.zip) Unloaded->Constructed->Pre-initialized
MutantCreatures{1.4.4} [Mutant Creatures] (Mutant Creatures.zip) Unloaded->Constructed->Pre-initialized
iChunUtil{2.4.0} [iChunUtil] (util^iChunUtil2.4.0.zip) Unloaded->Constructed->Pre-initialized
PortalGun{2.0.2} [PortalGun] (PortalGun2.0.2.zip) Unloaded->Constructed->Pre-initialized
modteamcrafted{v2.2} [The Team Crafted Mod] (TeamCraftedMod_1.6.4.zip) Unloaded->Constructed->Pre-initialized
chylex_ButterMod{1.0} [Butter Mod] (The Budder Mod.zip) Unloaded->Constructed->Pre-initialized
camping{2.0e} [The Camping Mod 2.0] (TheCampingMod_2.0e.jar) Unloaded->Constructed->Pre-initialized
Bricks{2.6.4} [Throwable Bricks Mod] (Throwable Bricks Mod v2.6.4.zip) Unloaded->Constructed->Pre-initialized
Peanuts{1.1.2} [Toontown] (Toontown.zip) Unloaded->Constructed->Pre-initialized
Launched Version: 1.6.4-Forge9.11.1.965
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.3040, Intel
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
how do I fix this?

I am using forge 1.6.4