Remote desktop web access

I am having trouble getting my remote desktop web access working. I have a PIX 501 which i enabled port 3389 by using access-list premit i also configured a static IP which I tested useing whatismyip.com, I checked all windows firewall properties I cant figure out why this is not working. IIS has been installed on both computers eventhough it only has to be on one … any help would be greatly appricated thanks…