Try deleting LW's preferences & see if that helps. Limewire should be COMPLETELY closed. See points 2 & 3 in the link below.
Fixes for Limewire
FYI...This will reset all of your settings in Limewire.
Also, you might want to get a newer version of Java. Be sure to use the OFFLINE installer. Here's the link:
Java Download
Hope this helps!