Hi Ray, I have managed to get it working after correcting a few things. It seems I had a double NAT conflict on my Airport Extreme as I am using a voip modem. I discoonected the Voip modem and corrected that problem. I did get the correct public IP but when I entered that it still cam back with an error ” check IP or port” . I then only entered 80 after the ip not 8080 and it worked. I do not know why but it did. Perhaps you can make more sense of that than I can.
thanks for your help to date.