forge server 1.6.4

[leestar]

Trying to create a server no mods are in use yet, just trying to get the server working first

 

When trying to create a server, whenever i try and launch the "minecraft-universal-1.6.4-9.11.1.965" jar file, it just wont load, gives me the loading icon for about 1 second, and creates "ForgeModLoader-server-0"  this is what that file says.

 

2016-08-12 13:21:42 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading

2016-08-12 13:21:42 [iNFO] [ForgeModLoader] Java is Java HotSpot Client VM, version 1.8.0_101, running on Windows 10:x86:10.0, installed at C:\Program Files (x86)\Java\jre1.8.0_101

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Java classpath at launch is C:\Users\leestar\Desktop\New folder\minecraftforge-universal-1.6.4-9.11.1.965-v164-pregradle.jar

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Java library path at launch is C:\Program Files (x86)\Java\jre1.8.0_101\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Skype\Phone\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;.

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Enabling runtime deobfuscation

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Instantiating coremod class FMLCorePlugin

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Enqueued coremod FMLCorePlugin

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Instantiating coremod class FMLForgePlugin

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Enqueued coremod FMLForgePlugin

2016-08-12 13:21:42 [FINE] [ForgeModLoader] All fundamental core mods are successfully located

2016-08-12 13:21:42 [FINE] [ForgeModLoader] Discovering coremods

2016-08-12 13:21:42 [iNFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

2016-08-12 13:21:42 [iNFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

2016-08-12 13:21:42 [iNFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

2016-08-12 13:21:42 [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)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:48)

at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:17)

 

anyone have an idea what my problem is/do you need more info