i burned a cd the other day. i played it on my stereo and only the first 8 songs play. there are 19 in all. today i played it again and it played up to 12 songs. i made the mistake of pressing next. as soon as i did that , the song wouldn't play. if you go to next or previous they still don't play. i tried burning a new cd with the same tunes and none would play. what is the story?