Ok there is nothing blocking you. So the odds are your isp has started blocking or shaping. The link below may be of some help the first thing I would try is different ports. There is a chance I am wrong you might want to try the .limewire fix in the second link first and maybe uninstalling and re installing Java. But I doubt it will do any good.
http://www.gnutellaforums.com/showth...threadid=32882 http://www.gnutellaforums.com/showthread.php?t=36420