I burned a dvd of converted super 8 home videos from a HP Windows Vista desktop computer. The burned DVD-Rdl containing the converted super 8 movies will not playback on the sonic blue DVR4400 player but will of course playback on the HP desktop computer. On the getting started page of the owner's manual, playable media is a DVD. I tried to view the burned DVD on another Sony DVD player and it will not play on the Sony player either. Any help? Thanks, Dave