From the limited information you have provided it appears that your problem could be caused by the use of problematic poor quality DVD Media you have used to make you BackUp Copy of your original Commercial DVD Movie title.
Suggest obtaining known proven quality error free DVD Media which constantly produces quality error free results such as Taiyo Yuden or Verbatim DVD Media.
If you are using known proven quality error free DVD Media (Taiyo Yuden or Verbatim DVD Media) it is possible that the cause of your problem is that there is a â€œCopying Flawâ€ in the BackUp Copy of your original Commercial DVD Movie title you have made. Suggest ensuring that the undisclosed DVD BackUp copying software program(s) you are using is the newest most current up to date version that is available. The Commercial DVD Movie manufactures are constantly employing new sophisticated anti copying schemes which requires individuals who copy Commercial DVD Movies to routinely update their copy protection removal software program. Suggest checking SlySoftâ€™s copy protection removal â€˜AnyDVDâ€™ software program ->
Also ensure that your undisclosed DVD Burner has the newest most current up to date Firmware that is available installed on your DVD Burner. The reason up to date DVD Burner Firmware is important is discussed in the below Web Link ->