I just purchased the Apple mini display port to DVI adapter and HDMI to DVI Video Cable along with separate Belkin audio cables in order to use my Apple MacPro on my Samsung HDTV. Unfortunately, I only see my laptop "wallpaper" photograph when connecting to the HDMI. Unable to see the dock, files, or the mouse arrow moving. Tried connecting to a host of HDMI/DVI inputs with the same wallpaper seen. Tried connecting first with the TV powered and the computer powered down followed by powering up the TV followed by the computer. Any other suggestions to see my computer on the TV??