Take a look at this thread...I had the EXACT same problem that you are having, and I think the person in this thread may be, too...

http://www.gnutellaforums.com/connection-problems/66049-need-serious-help-very-frustrated.html

P.S. I also had the brick wall in front of the globe (signifying firewall problem), even though I had my Windows FW turned off and McAfee set to allow LW full access. To complicate matters further, the brick wall would come and go!