lexy1650,
Try this fix first...It sounds a little wierd but it really does work...
http://www.gnutellaforums.com/281366-post6.html
If that doesn't work, this is where you will find the preference folder in vista...
LimeWire Pref Folder in Vista
And the instructions on how to delete it once found...
Fixes for Limewire when LW isn't operating as it should