Try this first...
Uninstall 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
Now if they don't help, try port forwarding your router as it has a Nat Firewall within...
These are your instructions...
Port Forwarding for the Linksys WRT54GS