Have a look at this post it's about Windstreams firewall....
http://www.gnutellaforums.com/218813-post8.html
Also try changing your Java Version...
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...
Fixes for Limewire when LW isn't operating as it should
If none of the above do the trick could you tell me what security you are using...
