If your LW isn't connecting, try the fix here first...it's a really old post but a few people have recently found that it's solved their problem
For those who can't connect

If that doesn't help, there are other fixes to try in the thread below. Just remember to have LW properly closed before replacing gnutella.net file & deleting preferences folder. Also, when replacing Java versions, remember to have only 1 version of Java installed at a time.
If LW Will Not Connect

If nothing there helps at all, post back with your system details.