Ok a couple of things to try...Try each fix until one works...
Try uninstalling your 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
Also you will need to configure the McAfee security suite and limewire correctly, here are the instructions...
Port Forwarding for the McAfee Security Center
Your router also has a Nat Firewall and you may need to Port Forward..
Here are the instructions...
Port Forwarding for the Linksys WRT54GS