So you tried the other ports also. Hmm ...

I wonder ... how about trying another gnutella program & seeing if you fare better? Phex: http://www.gnutellaforums.com/general-discussion/55271-phex-2-8-4-final-released.html

Or FrostWire: http://www.frostwire.com/index.php?title=Main_Page

Or BearShare Lite: http://www.filehippo.com/download_bearshare_lite/ (though you might want to check out version 5.1 & not 5.2)