billy bunter,
Rather than turn off your XP firewall, make sure it's configured properly. I thought LOTR gave directions for how to enable UPnP in your router? Well, try port forwarding then. Don't forget to set up a static IP address first

roookie777,
Please tell us your details (check the link below)
http://www.gnutellaforums.com/showthread.php?t=62652