I see nothing wrong with your port forward rules.
Take a closer look at the options on the Router, is there a security which gives particular strength of security? Some routers have such an option, works in some ways like a firewall rather than just an average NAT router.

Other than this, only as I suggested about trying those suggestions here http://www.gnutellaforums.com/connec...t-connect.html

(Not sure why those images will not show. I tried editing one, made no difference.)