When you use your phone, are you on WiFi inside the same network?
If not; then you need to configure your router/firewall to forward traffic on port 80 to the internal IP address of your FMS machine.
Thanks. I was on an outside network on my phone to see if it worked. It didn't.
So from trawling the net I got the impression I had to 'port forward'. I am now trying to figure out how to do that! Any guidance???
See if your router is listed in the tutorials they have here. Also make sure that you are not running the firewall settings on the FMS machine. If you are, google how to open port 80 on it.