1) have you set the pc your using so that it has a static (not dynamic) ip address? This needs to be done via windows networking (tcp settings on your pc).
2) If so, have you forwarded the necessary ports in the linksys setup TO that pc's static ip address?
3) If so, under DMZ settings for the linksys router, have you set your pc's static ip address as a dmz computer?
4) if so, have you disabled all firewalls (windows has one, as does norton antivirus 2005)?