Xbox 360 won't talk to WMP11

I'm having issue with my 360 and my Xbox 1 (XBMC) talking to my PC running Windows XP SP2 (WMP11).

Heres the setup.

Xbox and Xbox 360 connected to Netgear WGPS606 Wireless Switch/Print Server
Wirelessly connected to Belkin ADSL2 MIMO Router
PC Connected directly to router via Cable.

No firewall on PC, All individual units can go on the Internet, so RSS news feeds and IMDB searches work on XBMC and XBL works on the 360.
PC Can FTP to XBMC unit.

All 3 units set static IP's, outside the Routers DHCP range

Any help would be greatly appreciated

 

Turn the 360 on, goto WMP11 and tell it to find supported devices

 

Just tried that, PC will see the 360, but the 360 won't see the PC.
No firewalls on the PC, and just to double check I forwarded ports on my router.

 

Its such a waste of time this extender thing coz it never works!

 

Heres an interesting bit, I got my 2nd 360, plugged it into a hub connected to my PC.

PC see's 2 360's now, but neither console will talk to the PC.

 

Perhaps some sort of firewall issue? It could be as simple as opening up a port or two.

 

No firewalls enabled, Thought that at first