I cant get Voltz to work on my Multicraft server (GGServers) PLZ HELP!

[MoonJumper]

So i want to start a Voltz server for me and my friends and i put all the folders in all the right places and then when i launch the server the console comes up with this:

 

12.01 05:40:24 [Multicraft] Server stopped

12.01 05:40:24 [Multicraft] Looks like a crash, check the server console. Return value: 1

12.01 05:40:24 [Multicraft] Server shut down

12.01 05:40:24 [server] INFO ... 13 more

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader.findClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.security.AccessController.doPrivileged(Native Method)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader$1.run(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader$1.run(Unknown Source)

12.01 05:40:24 [server] INFO Caused by: java.lang.ClassNotFoundException: ab

12.01 05:40:24 [server] INFO at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.loadClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader.findClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.security.AccessController.doPrivileged(Native Method)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader$1.run(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader$1.run(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader.access$100(Unknown Source)

12.01 05:40:24 [server] INFO at java.net.URLClassLoader.defineClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.security.SecureClassLoader.defineClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.defineClass(Unknown Source)

12.01 05:40:24 [server] INFO at java.lang.ClassLoader.defineClass1(Native Method)

12.01 05:40:24 [server] INFO Exception in thread "main" java.lang.NoClassDefFoundError: ab

12.01 05:40:24 [Multicraft] Loaded config for "Default"

12.01 05:40:24 [Multicraft] Starting server!

 

 

PLZ HELP!