Problem with iMac/Limewire
 

I have an iMac 500 running Mac OS 9.1. I had Limewire before but had to delete it and download the basic program and install it again. Now when I go to open Limewire either nothing happens at all or it gives this message:
UNABLE TO LAUNCH JAVA APPLICATION
The main class "com/zerog/lax/LAX"could not be loaded.
Either it is not in the classpath or has a static initializer that has a class not in the classpath.

How can I rectify this problem?