Crashing error

I'm new here but i'm not new to modding and i can't figure this problem out, i was hoping that you guys would

here is the error report i get when i try to start minecraft (It crashes at the loading screen).(I'm using minecraft comes Alive or at least trying to)

---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

Time: 06/02/13 4:38 PM

Description: Failed to start game

cpw.mods.fml.common.LoaderException: java.lang.IllegalAccessError: tried to access field bdw.m from class cpw.mods.fml.client.registry.ClientRegistry

at cpw.mods.fml.common.LoadController.transition(LoadController.java:117)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:487)

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.IllegalAccessError: tried to access field bdw.m from class cpw.mods.fml.client.registry.ClientRegistry

at cpw.mods.fml.client.registry.ClientRegistry.bindTileEntitySpecialRenderer(ClientRegistry.java:26)

at cpw.mods.fml.client.registry.ClientRegistry.registerTileEntity(ClientRegistry.java:21)

at mca.ClientProxy.registerRenderers(ClientProxy.java:44)

at mca.MCA.preInit(MCA.java:167)

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:485)

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.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:486)

... 5 more

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

---------------------------------------------------------------------------------------

-- System Details --

Details:

Minecraft Version: 1.4.7

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.6.0_31, Sun Microsystems Inc.

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Sun Microsystems Inc.

Memory: 431161992 bytes (411 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)

JVM Flags: 2 total; -Xms512m -Xmx1024m

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 v7.26 FML v4.7.4.520 Minecraft Forge 6.6.0.497 4 mods loaded, 4 mods active

mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized

FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized

Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized

MCA [MCA - Minecraft Comes Alive] (mca v3.1.2.zip) Unloaded->Constructed->Errored

LWJGL: 2.4.2

OpenGL: Intel® HD Graphics GL version 2.1.0 - Build 8.15.10.2182, Intel

Is Modded: Definitely; Client brand changed to 'forge,fml'

Type: Client (map_client.txt)

Texture Pack: Default

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

I really don't know whats going on and p.s. I have tryed to use other mods on with forge (they all require it) and i got the same crash report.

please help