You don't have to force ip if you are only behind your computer firewall, only if nated or behind router. I don't know if unforce ip would help though.
Also, I never said no firewall, only to open the port LW uses...
SayNoToNimrod: if you bought the modem, there is probably a manual so you can disable that firewall. If it comes from your ISP, well... You can always do a search on google about your model of modem and firewall to see if it comes with one.
Peerless what is your firewall?
Bone chance