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I have multiple mods such Zombieapocalypse,minecolony, and thaumbcraft. It was working great until i downloaded java 64 bit. Now i fix all that but not the moded version of minecraft . please help

Here is the error code

Nov 02, 2014 1:50:06 AM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Nov 02, 2014 1:50:07 AM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Nov 02, 2014 1:50:07 AM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2014-11-02 01:50:07 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2014-11-02 01:50:07 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 8:amd64:6.2, installed at C:\Program Files\Java\jre1.8.0_25
2014-11-02 01:50:07 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-11-02 01:50:07 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2014-11-02 01:50:07 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-11-02 01:50:07 [SEVERE] [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(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

It's java 8 which doesn't play nice with any but latest forge versions. Install java 7 and point your profile to it.

Quote from zohar101»

It's java 8 which doesn't play nice with any but latest forge versions. Install java 7 and point your profile to it.

thanks now i got minecraft again!!!