Turn off firewall, check work, check firewall rules, turn on firewall.
If you are running Windows Media Sharing, stop on the time of checking.

I already checked if the firewall is causing the problem and turned it off together with Virusscanner and ThreatFire. Unfortunately it didn't help ...

When I was using the 1.01 of Wild Media Server under Win XP everything worked fine and I did not have any trouble finding the WMS with my Samsung LE40B650 TV. When I switched to Windows 7 I installed version 1.03 and activated the licence from start. And now the TV has real trouble finding the WMS ...