When I dub from video to DVD, I'm unable to play the DVD on any other equipment. I've tried it multiple times using Sony RW DVDs. I've finalized the DVD as well. The DVD works only on the machine I copied it on. It won't even work on other Sony DVD players. I've read the instructions many times and don't see I'm doing anything wrong. Is it just this type of machine? Any ideas on what I should do?