Check for a bug report by going to LW's Prefs-Bug Report & click for an example. In the window that appears scroll down (about half way down) to the part that says: "Recieved incoming this session". If it says ‘True’ then LW has no problem with firewalls, but if 'False' it does have a prob. See eg in link (eg is for pc but same principle):
http://www.gnutellaforums.com/showth...765#post103765 Tell us what yur result is True or False? Wht type of connection do you have? Do you have a router? Where are you trying to connect from: home, school, work, other institution?