[Users] Spice Console Access

Morning All, I have oVirt 3.1 running on an F17 installation(All In One). When on the same network as the said server, via webadmin, I can open the console to VM's setup to use Spice. However, when I come in from the outside via an ADSL router no joy. Please note, I use my same laptop each time. I have the following setup : Port 22 -> Port 22 (oVirt Server) Works Port 80 -> Port 80 (oVirt Server) Works Port 443 -> Port 443 (oVirt Server) Works Ports 5900 - 5910 -> Ports 5900 - 5910 (oVirt Server) ??? I have run : [root@ovirt ~]# vdsClient -s 0 list | grep displayPort displayPort = 5900 [root@ovirt ~]# Hence the port forward range. All I get is a window opening, cursor becomes an X and after about 30 seconds it closes. Any help would be much appreciated. Regards Shaun