There's actually another tip you can choose if you don't want uninstall McAfee altogether...

This is one suggestion...
“No Compromise” Vista-McAfee-Limewire Solution

If no luck there...
http://www.gnutellaforums.com/258193-post45.html

These are the Port Forward instructions for your router...
Port Forwarding for the Linksys WRT54G

And one more tip make sure you are using Java 6...

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If you dont live for something...
You die for nothing...