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.)
http://www.gnutellaforums.com/genera...der-vista.html
Make a note of all your settings first however, because once you delete this folder & re-open LW, you will need to reset all options again such as days to keep incompletes, location of shared folder again, etc.