Go to NorbiesWorld (click on link) & register & follow his directions carefully.

After solving the issues via Norbie. Reinstall LW. Chances are LW may have been corrupted. Also try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page) before reinstalling. But note any important settings because once you delete the LW prefs folder you'll need to reset all your options.