Try an earlier version: LW 4.16, 14, or 12 LimeWire 4.16.3 Download, ___ LimeWire 4.14 Download, ___ LimeWire 4.12.

You will probably need to remove the firewall rule you made for LW & re-add it for the different version for Norton Firewall. Disable your XP firewall because both Norton & XP firewalls run together will result in less security not more, and will cause problems running efficiently. Configuring Norton Internet Security

I see your ISP is Road Runner. No problems running p2p thru them as far as I know.
However, the fact you are having problems using other p2p sharing programs suggests a problem at your end.

Edit: if still problems, try these suggestions: http://www.gnutellaforums.com/connec...t-connect.html