By opened a port do you mean you did manual port forwarding on your linksys? For it to work correctly the 1st step must be to set up a static ip. Linksys port forwarding here
http://linksys.custhelp.com/cgi-bin/...wers.search_nl & within LW do
Manual port forward instructions & sample image
BTW if you were going to use 2 limewires with one on each computer, you'd need to do a separate port forward for each but using different ports.
Did you make sure UPnP was enabled on the linksys before this?
Is your XP firewall disabled? Did you configure McAffee to allow LW?