My DVD player manual lists DVD-Rs to be compatible with my DVD player. However, I made a slideshow, burned it to a Sony DVD-R, and my DVD player couldn't load the disk. The DVD player is a Sony, and it is only a year old. Could this be the media I used, or is it more likely to be a problem with the burning process or a setting I used during the burn process? Obviously, I am somewhat of a novice at this!