server startup error

[redneckreject]

Title: server startup error

Version: 3.1.2

OS: 64 bit

Java Version: java 6

Description of Problem:

on start up of server i get a java error

Error Messages:

Error Log:

14.08 13:23:41 [server] INFO ... 12 more

14.08 13:23:41 [server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:356)

14.08 13:23:41 [server] INFO at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

14.08 13:23:41 [server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:423)

14.08 13:23:41 [server] INFO at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

14.08 13:23:41 [server] INFO at java.security.AccessController.doPrivileged(Native Method)

14.08 13:23:41 [server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

14.08 13:23:41 [server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:366)

14.08 13:23:41 [server] INFO Caused by: java.lang.ClassNotFoundException: vz

14.08 13:23:41 [server] INFO at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)