If you are able to make copies that play on your computer but they will not play back on your DVD player, or the burn process will not even start, we recommend you go here to check the compatibility of your DVD burner, DVD player and DVD media. There are so many different combinations it is important to know if you need to change the DVD media that you are copying to. It could be as simple as just changing the brand of blank disks you are using to be compatible with your other hardware.
This site has a lot of good info about burner, player and media type compatibility. You can enter all your specifications in the pull down menus and it will recommend the best combinations.
Go here to check the compatibility of your DVD burner:
videohelp : DVD Writers
Go here to check the compatibility of your DVD player:
videohelp : DVD Players
Go here to check the compatibility of your DVD media:
videohelp : DVD Media
You may also want slow down the speed of your burner in the settings to ensure the best quality.