Problem [Unleashed]NoClassDef Error

[TampaPowers]

http://pastebin.com/jN9MEzmt

java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient

Using Unleashed Server(+minechem) v 1.1.1 downloaded from the website on a Debian 5.0 machine.
Fresh install on my dedi; Tried with manual minecraft_server.jar and injecting forge, same result.

 

[cjm721]

You have a client side mod on the system (back tools)