Exception in thread "main" java.lang.NoClassDefFoundError: Gui

[crazytotz]

everytime i try to load the client i get this. i have put my no-ip in and still nothing.
please help me.....

Caused by: java.lang.ClassNotFoundException: Gui
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Gui. Program will exit.
Press any key to continue . . .

[Shaban]

Same