---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 06.01.13 17:35
Description: Failed to start game

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: railcraft/common/util/inventory/EnumItemType
at cpw.mods.fml.common.LoadController.transition(LoadController.java:117)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:486)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:161)
at net.minecraft.client.Minecraft.a(Minecraft.java:410)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:744)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: railcraft/common/util/inventory/EnumItemType
at railcraft.common.core.Railcraft.preInit(Railcraft.java:125)
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:483)
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:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
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:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:485)
... 5 more
Caused by: java.lang.ClassNotFoundException: railcraft.common.util.inventory.EnumItemType
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:179)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 31 more
Caused by: java.lang.NoClassDefFoundError: railcraft/common/api/core/items/IItemType
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:172)
... 33 more
Caused by: java.lang.ClassNotFoundException: railcraft.common.api.core.items.IItemType
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:179)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 37 more
Caused by: java.lang.SecurityException: class "railcraft.common.api.core.items.IItemType"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(Unknown Source)
at java.lang.ClassLoader.preDefineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:172)
... 39 more

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

-- System Details --
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1679936600 bytes (1602 MB) / 2058027008 bytes (1962 MB) up to 2058027008 bytes (1962 MB)
JVM Flags: 2 total; -Xms2048m -Xmx2048m
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 v7.25 FML v4.6.17.515 Minecraft Forge 6.5.0.489 Optifine OptiFine_1.4.6_HD_U_A2 39 mods loaded, 39 mods active
mcp Minecraft Coder Pack Unloaded->Constructed->Pre-initialized
FML Forge Mod Loader Unloaded->Constructed->Pre-initialized
Forge Minecraft Forge Unloaded->Constructed->Pre-initialized
CodeChickenCore CodeChicken Core Unloaded->Constructed->Pre-initialized
mod_NotEnoughItems Not Enough Items Unloaded->Constructed->Pre-initialized
mod_ReiMinimap mod_ReiMinimap Unloaded->Constructed->Pre-initialized
denLib denLib Unloaded->Constructed->Pre-initialized
BasicComponents Basic Components Unloaded->Constructed->Pre-initialized
IC2 IndustrialCraft 2 Unloaded->Constructed->Pre-initialized
AtomicScience Atomic Science Unloaded->Constructed->Pre-initialized
BuildCraft|Core BuildCraft Unloaded->Constructed->Pre-initialized
BuildCraft|Builders BC Builders Unloaded->Constructed->Pre-initialized
BuildCraft|Energy BC Energy Unloaded->Constructed->Pre-initialized
BuildCraft|Factory BC Factory Unloaded->Constructed->Pre-initialized
BuildCraft|Transport BC Transport Unloaded->Constructed->Pre-initialized
BuildCraft|Silicon BC Silicon Unloaded->Constructed->Pre-initialized
ElectricExpansion Electric Expansion Unloaded->Constructed->Pre-initialized
ExtrabiomesXL ExtrabiomesXL Unloaded->Constructed->Pre-initialized
Forestry Forestry for Minecraft Unloaded->Constructed->Pre-initialized
Railcraft Railcraft Unloaded->Constructed->Errored
RedPowerCore RedPower Unloaded->Constructed->Pre-initialized
RedPowerBase RP Base Unloaded->Constructed->Pre-initialized
RedPowerMachine RP Machine Unloaded->Constructed->Pre-initialized
RedPowerCompat RP Compat Unloaded->Constructed->Pre-initialized
RedPowerWiring RP Wiring Unloaded->Constructed->Pre-initialized
RedPowerLogic RP Logic Unloaded->Constructed->Pre-initialized
RedPowerLighting RP Lighting Unloaded->Constructed->Pre-initialized
RedPowerWorld RP World Unloaded->Constructed->Pre-initialized
RedPowerControl RP Control Unloaded->Constructed->Pre-initialized
ThermalExpansion Thermal Expansion Unloaded->Constructed->Pre-initialized
ThermalExpansion|Factory Factory Unloaded->Constructed->Pre-initialized
ThermalExpansion|Energy Energy Unloaded->Constructed->Pre-initialized
ThermalExpansion|Transport Transport Unloaded->Constructed->Pre-initialized
GregTech_Addon GregTech-Addon Unloaded->Constructed->Pre-initialized
AdvancedSolarPanel Advanced Solar Panels Unloaded->Constructed->Pre-initialized
NEIPlugins NEI Plugins Unloaded->Constructed->Pre-initialized
TC Traincraft Unloaded->Constructed->Pre-initialized
CustomOreGen Custom Ore Generation Unloaded->Constructed->Pre-initialized
mod_CustomOreGen mod_CustomOreGen Unloaded->Constructed->Pre-initialized
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2875, Intel
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: faithful32pack.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: ERROR NullPointerException: null