Hi, I'm Nathan.
Sorry to hear that you're having trouble with this but I'll do my best to help you.
Can you tell me what discs you are using?
Are they DVD+ or DVD-
or DVD+RW or DVD-RW?
Okay that is the proper type, but it is possible to get a bad batch of discs, it would help to test another brand of disc, if possible.
Beyond that, you may be using the wrong file type (mpeg2 is the usual standard), or forgetting to close/finalize the session.
Is it just one file?
Okay that is normal, as the vob package files cannot exceed 1gb.
So something else is missing here, either you aren't finalizing the disc, or the actual disc just isn't readable by your particular player.
I'd try another disc next, and would recommend a memorex disc type
I wouldn't expect the + discs to work, most standard players can only take the - discs.
Well it is a potential solution as well as a diagnostic test, to rule out the possibility of an incompatible disc.Here is one I'd try: http://amzn.to/2aHgxmu