I'm trying to connect my MBP to an HDTV with a dvi/hdmi cable. When I plug it in, all I can see on my my HDTV is my MBP wallpaper. Another poster on another forum with the same problem said to mirror the displays, is this correct or is there a better way? And how do I do this, my display options (in the system settings) only has two tabs: display, and color. No arrangements tab. Does my MBP have to be connected to the TV to have an arrangements option? Please help, thanks.