Microsoft Help Forums: Cannot set up media center extender - Microsoft Help Forums

I have been trying to set up a Linksys DMA2100 Media Extender on my Windows 7
Home Premium system. The Extender is wired to my ATT 2 wire modem/router. When
I enter the 8 digit code into Media Center I receive the error “cannot set up
Extender”. If I go to Network Sharing Center> see full map the extender is
there. I have disabled windows firewall and connected the extender to my
computer in order to bypass the ATT Router with the same negative results. I am
at a loss, Linksys Tech. Support’s answer was to install Vista :-(

Any help would be appreciated.