Windows 7 Hdmi Output Is Only Available When It Is Off

i have a dell core 2 duo with 3gb of ram, and an ati hd4650, when i boot up, both outputs get the boot up screens, when it gets into windows, the hdmi output appears to be unplugged(not available for selection, just not there) it is worth noting that it worked fine under vista, anyways, when i switch the source on my receiver, or turn it off, as long as it is plugged in, it then gets detected, and i can modify resolution, and apparently it is outputting sound as well, i cannot verify this because the receiver is OFF, tried various versions of the catalyst drivers, and one of them worked, until i went into the catalyst center to change something and it went back to what it was doing i feel it is something wrong with the windows side or the driver, ive tried upgrading to the x64 version, ive tried different cables, different ports/plugs, it just wont work, i have no idea where to look in the registry to change when it is detected, but when i turn off the receiver or switch off of that source, the monitor flickers and the output is detected, this is frustrating because i wanted all of my home machines to be on 7, and i really dont want to go back to vista.