Hi guys i played now minecraft 1.6.4 and when i install forge 9.11.1.865 dont load only appear on launcher this:

 

ene 07, 2015 4:06:25 PM net.minecraft.launchwrapper.LogWrapper log

INFORMACIÓN: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

ene 07, 2015 4:06:25 PM net.minecraft.launchwrapper.LogWrapper log

INFORMACIÓN: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker

ene 07, 2015 4:06:25 PM net.minecraft.launchwrapper.LogWrapper log

INFORMACIÓN: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker

2015-01-07 16:06:25 [iNFORMACIÓN] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading

2015-01-07 16:06:25 [iNFORMACIÓN] [ForgeModLoader] Java is Java HotSpot 64-Bit Server VM, version 1.8.0_25, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre1.8.0_25

2015-01-07 16:06:25 [iNFORMACIÓN] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

2015-01-07 16:06:25 [iNFORMACIÓN] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

2015-01-07 16:06:25 [iNFORMACIÓN] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

2015-01-07 16:06:25 [GRAVE] [ForgeModLoader] Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source)

at java.util.ArrayList$Itr.remove(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)

at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

Java HotSpot 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

 

Any one can help?txs

thisis bad...because i want play minecolonies this is or version 1.6.4...