I'd say that Optimum Online is your problem. You're not the first
Read these few threads
http://www.gnutellaforums.com/showth...threadid=33712

http://www.gnutellaforums.com/showthread.php?t=53091

and there's a couple of OOL threads floating around on the Conn Probs page right now. Try the changing ports fix in the second thread