If you wait for 30-60 seconds, do you see a message box pop-up? If so, it will most likely say "Source Connection Error".
If you are able to connect from his PC but not his laptop, are they on the same local network? Does he perhaps have more than one router on his network? This can cause issues with the iCam auto-connection logic if there are multiple routers on the network each creating their own sub-networks.