Have you tried uninstalling Limewire completely, and then reinstalling it ? Uninstall everything, delete the Limewire folder after uninstall + the preference folder + the incomplete folder
Remember to close down Limewire comletely, before uninstalling
Use the offline installer from Limewire
You will find the preference folder under:
C:/Documents And Settings/(username*)/.limewire
incomplete folder:
C:/Documents And Settings/(username*)/incomplete
* username being your username
A folder called Limewire will be in programfiles (probably empty, but delete it anyway)
Also there might be a problem with your java, try to reinstall it too, use the offline installer
Get it here:
Java JRE 1.5 update 6
Uninstall all previous versions before installing. Use add/remove programs
Hope this helps
Remember to post back if it works or not, as this is a new problem