I have just purchased the HD_DVD player for the 360, and it seems to be working great, however the movies are playing with a letterbox format. The 360 is set to 1080i widescreen. The HD-DVD menus play in full screen, but the movie does not. I have tried four different movies with no avail. It is hooked up to a new 42 inch Panasonic Plasma. I have this same problem with my upconverting dvd player hooked up through HDMI. Please someone help me out.