DoomDevil

My minecraft started crashing and i don't know why please help me here's the crash log ---- Minecraft Crash Report ---- // Would you like a cupcake? Time: 7/7/14 11:02 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: mods/immibis/core/impl/crossmod/EnergyConsumerTraitImpl_BC at cpw.mods.fml.common.LoadController.transition(LoadController.java:162) at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:514) at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:239) at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467) 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: mods/immibis/core/impl/crossmod/EnergyConsumerTraitImpl_BC at mods.immibis.core.ImmibisCore.preInit(ImmibisCore.java:81) at mods.immibis.core.ICNonCoreMod.preinit(ICNonCoreMod.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.preinitializeMods(Loader.java:512) ... 10 more Caused by: java.lang.ClassNotFoundException: mods.immibis.core.impl.crossmod.EnergyConsumerTraitImpl_BC 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.NoClassDefFoundError: buildcraft/api/power/IPowerReceptor 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:180) ... 40 more Caused by: java.lang.ClassNotFoundException: buildcraft.api.power.IPowerReceptor at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:99) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source)