I'm trying to burn a photoshow with 137 pictures and 3 songs. When I burn a dvd, it goes through the whole process and I get a notification that it was successful. When I play in the dvd player, it only plays 3/4 through and stops. It plays a little longer in my laptop. When I check the dvd in the computer, it shows that the disc is full at 547MB but the disc capacity is 8.5GB. What am I doing wrong.