Try these fixes and see if they help...
Try deleting your preference folder....
Fixes for Limewire when LW isn't operating as it should
To find your hidden folders...
http://www.gnutellaforums.com/genera...der-vista.html
Try uninstalling your Java from the add/remove programs and then re-install the JRE 5.11 offline version....
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
If those fixes don't help could you post these details please...
http://www.gnutellaforums.com/connec...-you-post.html