You don't say which version of Java you are using and this is important since Limweire is totally dependent on Java.
Also there is a Beta version 4.9.35Beta which, by all accounts overcomes many problems.
personally I would try the Beta version,
If that doesn't work. Uninstall it including the preferences.
Reinstall the latest Java by downloading the installer, not doing it over the net. (see
http://www.gnutellaforums.com/showth...=fixes+working bearing in mind that this is an old thread)
Reinstall the Limewire and I hope this will work
Le us know if it helps (geting pro will NOT help)