Do this simple test for us. Using your browser go here:
http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?
You should not have 2 firewalls active. Windows XP has its own firewall. So disable XP's firewall by going to the control panel, double click on Windoze Firewall, check the disable box.
Do this test again:
Bug Report instructions & sample image Is the result True/False?
Try deleting your LW Preferences folder
whilst LW is closed; instructions here:
Fixes for Limewire
When you open LW again, leave it for up to 30 mins for it to connect. If it won't connect, go to menu File>Disconnect. Wait a minute, then go File>Connect.