error when launching

[gthroc]

Launcher Version: tekkit

Operating System: windows

Java Version: lastest version

Antivirus Program: non running at the moment of launch

Description of Problem:

--- BEGIN ERROR REPORT 1f2e317e --------

Generated 8/29/12 1:07 PM

Minecraft: Minecraft 1.2.5

OS: Windows 7 (amd64) version 6.1

Java: 1.7.0_06, Oracle Corporation

VM: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

LWJGL: 2.4.2

OpenGL: ATI Mobility Radeon HD 5870 version 3.2.9236, ATI Technologies Inc.

java.lang.IllegalArgumentException: Slot 241 is already occupied by codechicken.enderstorage.BlockEnderChest@593444ea when adding ic2.common.BlockRubSapling@76988c66

at pb.<init>(Block.java:251)

at qk.<init>(SourceFile:11)

at qk.<init>(SourceFile:19)

at zc.<init>(SourceFile:19)

at ic2.common.BlockRubSapling.<init>(BlockRubSapling.java:24)

at mod_IC2.load(mod_IC2.java:224)

at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)

at cpw.mods.fml.common.Loader.modInit(Loader.java:273)

at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)

at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)

at net.minecraft.client.Minecraft.a(Minecraft.java:429)

at net.minecraft.client.Minecraft.run(Minecraft.java:738)

at java.lang.Thread.run(Unknown Source)

--- END ERROR REPORT caf3beea ----------

Error Messages:

error is listed above

Error Log:

--- BEGIN ERROR REPORT 1f2e317e --------

Generated 8/29/12 1:07 PM



Minecraft: Minecraft 1.2.5

OS: Windows 7 (amd64) version 6.1

Java: 1.7.0_06, Oracle Corporation

VM: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

LWJGL: 2.4.2

OpenGL: ATI Mobility Radeon HD 5870 version 3.2.9236, ATI Technologies Inc.



java.lang.IllegalArgumentException: Slot 241 is already occupied by codechicken.enderstorage.BlockEnderChest@593444ea when adding ic2.common.BlockRubSapling@76988c66

	at pb.<init>(Block.java:251)

	at qk.<init>(SourceFile:11)

	at qk.<init>(SourceFile:19)

	at zc.<init>(SourceFile:19)

	at ic2.common.BlockRubSapling.<init>(BlockRubSapling.java:24)

	at mod_IC2.load(mod_IC2.java:224)

	at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)

	at cpw.mods.fml.common.Loader.modInit(Loader.java:273)

	at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)

	at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)

	at net.minecraft.client.Minecraft.a(Minecraft.java:429)

	at net.minecraft.client.Minecraft.run(Minecraft.java:738)

	at java.lang.Thread.run(Unknown Source)

--- END ERROR REPORT caf3beea ----------

[gthroc]

please help