You can try these fixes...
Try uninstalling all versions of 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 that does not help with your problem try deleting your preference folder/s...This will reset your configurations back to default and get rid of any corruption that may of happened...
Fixes for Limewire when LW isn't operating as it should
Also install PeerGuardian, it will help keep the fake hosts out...Remember to enable PG just before you start limewire up...
Phoenix Labs » PeerGuardian 2
Another thing if you are using limewire 4.13 and later you can apply this hostile list...
The TechNutopia Fullsize Hostiles List for BearShare and LimeWire
If none of the above do the trick could you supply these details please...
http://www.gnutellaforums.com/connec...-you-post.html