Hi I have copied a DVD to another DVD blank disk. The file will play on my computer but not on both of my DVD players. When formatting the DVD I selected the option where the DVD can be played on some DVD players. When this didn't work I formatted another DVD by selecting the other options where the DVD can be played on a computer but that didn't work either. I bought the DVD plus blank disks so was this the wrong format for my DVD Players? One of my DVD players is 3 years old.