Uninstall (with add/remove software, then by searching for anything that is limewire with the browser's search and deleting that), re-dld the installer (www.limewire.com) and re-install.
If no go, maybe it's your Java (www.java.com)

__________________
iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-