Why does the Next (skip) function not working?

flmink's picture

I own a Magnavox DVR-VCR combo and am dubbing old VHS tapes to DVD.  They look fine, but for some reason the Next (skip to next title) function does not work when I play the DVDs back on my computer or other DVD player.  I know this is a fairly minor problem, but wonder what I can do to fix it, since the Previous function works fine, and the Next function will work on the unit that recorded the DVDs.  Suggestions?