Minecraft crashes when I install Forge

[sonickiller360]

I'm using forge 4.0 build 200 and heres the crash report

 

 

Minecraft has crashed!     

      ----------------------     

 

Minecraft has stopped running because it encountered a problem; Failed to start game

This error has been saved to /Users/qfossier/Library/Application Support/minecraft/crash-reports/crash-2012-08-26_01.13.15-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

 

 

 

--- BEGIN ERROR REPORT 55be4b57 --------

Generated 8/26/12 1:13 AM

 

- Minecraft Version: 1.3.2

- Operating System: Mac OS X (i386) version 10.7.4

- Java Version: 1.6.0_33, Apple Inc.

- Java VM Version: Java HotSpot Client VM (mixed mode), Apple Inc.

- Memory: 497406768 bytes (474 MB) / 535232512 bytes (510 MB) up to 1060372480 bytes (1011 MB)

- JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M

- LWJGL: 2.4.2

- OpenGL: ATI Radeon HD 6970M OpenGL Engine GL version 2.1 ATI-7.18.18, ATI Technologies Inc.

- Is Modded: Definitely; 'forge,fml'

- Type: Client

- Texture Pack: Default

- Profiler Position: N/A (disabled)

 

cpw.mods.fml.common.LoaderException

at cpw.mods.fml.common.Loader.identifyDuplicates(Loader.java:332)

at cpw.mods.fml.common.Loader.identifyMods(Loader.java:295)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:414)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:192)

at net.minecraft.client.Minecraft.a(Minecraft.java:402)

at net.minecraft.client.Minecraft.run(Minecraft.java:734)

at java.lang.Thread.run(Thread.java:680)

--- END ERROR REPORT 62580dcf ----------

 

 

 

[luacs1998]

Update forge, make sure it's only installed once.