I'm new here but just posted a possible option you might want to check in a new thread.

I had a similiar problem and discovered that my modem had an additional firewall I needed to disable once I disabled it I could connect with no problems.

You might check through your help section of your ISP provider or the support site for the type of modem you have. I do not recommend disabling all your firewalls but I disabled the additional firewall associated with my modem and kept my XP, SP2 firewall enabled.


Good Luck,
Dave