I have the Toshiba HD-A3 HD DVD stand alone player and a Panny 50LC13 HDTV. The 50LC13 is an older HDTV and has component, VGA, & DVI inputs - no HDMI. I am using an HDMI to DVI cable. The HD-A3 says it is restricting the output to 480p. What do I need to do to get it to play 720p on the 50LC13? Thanks in advance!