This is happening for two reasons. The file types that you burned on the disk can't be played on your conventional player (they aren't compatible) or the speed that you choose to burn the disk is too high and the player can't read the disk. In order to fix this, I suggest you use Google in order to find the supported file types for your conventional player and use those. Also, you can try to burn the disk using the lowest speed possible. It will take longer than usual to complete the task, but by doing this, you avoid issues like this one.