Bit's no concern for LW 4. I suspect your issue is needing a 'fresh' gnutella.net file. Find a link to it near bottom of If LW 4 Will Not Connect (click on the blue link). An alternative one here http://www.gnutellaforums.com/343558-post10.html

Also, make sure your LW is not using same port as your other computer. ie: LW prefs -> Advanced -> Firewall.