Windows 7 Ultimate Edition and Media Extender XBOX 360.

Dear friends!

I cannot get my XBOX 360 to communicate (via hard wire) to my WMC7 PC. I
have tried everything i found on internet regarding this problem.

This is the error message i've got in the Media Center Log:

Media Center Extender Setup failed as the Extender was detected on the
network but the UPnP search for the Extender failed (timed out after 20000ms).

Som data about my environment:

-Netgear Router FVS318v3 with latest firmware and UPNP enabled. UPNP works
fine in my home network.
-Xbox 360 and Windows 7 PC are on same neetwork.
-Xbox 360 Live connections work fine
-Antivirus Microsoft Security Essentials.

I have tried disable firewall, open ports, disable antivirus, remove Media
Center Extender Certificate and so on...

I would be very happy if some one out there could come up with some ideas.

Thanks in advance!

Mats-Erik