In the older versions of limewire the preference folder is called the .limewire folder...
In the newer versions it is called the LimeWire Folder and it is hidden...
The instructions to find both of these folders are in this thread...
http://www.gnutellaforums.com/window...ng-should.html
If deleting the preference folder still doesn't fix your problem
I noticed that you are running Java 6.1, there have been a few members that have had trouble with this update...
Uninstall your Java from the add/remove programs and then re-install the JRE 5.11 offline version....(4th one down)
Java SE Downloads - Previous Release - JDK 5