rricci It is fairly probable that your preferences or your Java have become damaged in some way. I would suggest you do the following. Totally uninstall Limewire, including the preference folder. Then Reinstall Java , and then re install Limewire. Both installs should be made offline using the downloaded installers.
Read this thread first:-
http://www.gnutellaforums.com/showth...=fixes+working
Please let us know how you get on