1) You say that you have UPnP enabled on your modem/router, have you also enabled UPnP on Limewire? Yes both are enable

2) Are you the administrator for your modem/router, i.e. you cam make configuration changes without any problems? Yes

3) Have you tried to "port-forward" your modem/router? Yes

4) Are you connected to your modem/router by a patch cable or wirelessly? Patch Cable

5) Do you use any other protective applications apart from the Windows Firewall and AVG Free? Nothing else

6) Have you initiated UPnP and IGDC (Internet Gateway Device Control Client) within your WinXP Pro? Never heard of this.

I started with Java 1.5.0_11 and just upgradeded.

Also I have a client's computer here and their Limeware works fine connected to my router.