If your Stereo, DVD player, DVD recorder, or computer's CD/DVD drive skips, is erratic, gives corrupt information, etc.
it's time to clean the drive.
Buy one of those cd/DVD cleaners. basically what you get are a bunch of audio tracks you listen to. while you listen to the audio tracks (pay attention to the drivel so you know when it's done), it cleans your drive.
You may have a DVD Recorder that is old enough that it doesn't recognize cd's (check your manual first). All the newer ones do. It would have to be dated about 2002. (this does not apply to DVD burners!)