SERVER CANT START!

[KaLi97SK]

Title: SERVER CANT START!

Version: 3.1.2

OS: Windows7

Java Version: 7

Description of Problem:

Hi all, i have problem i cant start server See error messages

Error Messages:

7:39:35 [sEVERE] Unexpected exception

java.lang.IllegalArgumentException: Slot 241 is already occupied by codechicken.enderstorage.BlockEnderChest@7c55e052 when adding ic2.common.BlockRubSapling@69fa6743

at net.minecraft.server.Block.<init>(Block.java:181)

at net.minecraft.server.BlockFlower.<init>(SourceFile:11)

at net.minecraft.server.BlockFlower.<init>(SourceFile:19)

at net.minecraft.server.BlockSapling.<init>(BlockSapling.java:18)

at ic2.common.BlockRubSapling.<init>(BlockRubSapling.java:14)

at net.minecraft.server.mod_IC2.load(mod_IC2.java:286)

at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:351)

at cpw.mods.fml.common.Loader.modInit(Loader.java:263)

at cpw.mods.fml.common.Loader.initializeMods(Loader.java:618)

at cpw.mods.fml.server.FMLBukkitHandler.onLoadComplete(FMLBukkitHandler.java:142)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:176)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Error Log: