Tekkit Main Server issues

[Symfonium]

I'm having issues with my tekkit server. It's a fresh server but it won't load up. This is the error code that I am getting when I run the launch.bat

2014-12-13 17:10:33 [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)

I am running on a 64-bit computer, I have Java 8 and Java 7. Can anyone help me please and thank you.

[Curunir]

Your system is prefering Java 8, and this will not work. Refer to this ticket for the two possible solutions to this.

And next time, please take issues to the tracker right away.

[Symfonium]

Your system is prefering Java 8, and this will not work. Refer to this ticket for the two possible solutions to this.

And next time, please take issues to the tracker right away.

 

Thank you. Also, what do you mean by the tracker?

[Curunir]

The issue tracker, which is the only section on the forums where any support is given.

I'm making exceptions for first-posters, to get the message across.