Try configuring your Norton to allow Limewire...
These are your instructions...
Port Forwarding for the Norton Internet Security 2007
You could also try going to your connections Tab in limewire, if it's not showing up go to Veiw > Show/Hide and make sure the connection tab has a tick next to it...
Then click on the Hosts and remove them and let Limewire search for some more...
If you keep getting the same hosts over and over, add the IP numbers into your Host Filter...
Tools > Options > Filters and select the Host Filter and add these IP's into it and select apply...
If that doesn't do the trick you can give these tips a try...
http://www.gnutellaforums.com/connec...t-connect.html