After LW has been on for sometime, do this test:
Bug Report instructions & sample image If it says false then you probably do have a firewall issue.
Did you try deleting your LW Preferences folder? If you do you should 1st make a note of all your settings within LW b/c you'll need to reset them. Delete the LW Preferences folder called
.limewire (whilst LW is closed!) & found here: C:/Documents And Settings/your_username/.limewire