Depends on which operating version you are using & which LW version you started with. If you started with a version of LW over past 2 years, then the folder is now called limewire not .limewire.

(a) Try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #3 in Fixes for Limewire (sample image included at bottom of page.) (b) If using Vista then see http://www.gnutellaforums.com/genera...der-vista.html

I suspect chances are the problem is more than your preferences folder but a firewall somewhere. Provide all these details & this may help us to pin point the probable problem: System details - help us to help you (click on blue link)