Attack of the B team server creation help

[Rhinosaurus]

The Bteam Jar file does not run correctly and I get this error at the end of the file that pops up after i try to run Bteam Jar file

2015-05-15 18:04:05 [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)

 

 

[Munaus]

Google JavaLegacyFixer from LexManos. Put the file inside the mods folder of the modpack