I downloaded a mvcd file which was 2 discs, I converted these files to dvd using mainconcept. I then checked both files in power dvd and they were fine the beginning the middle and the end were all there. The problem started when I authored them in tmpgenc dvd author. When I did thios I then burnt the files that I created using nero, but when I came to play the disc about 20 minutes of the end of the film was missing. As I said when Ichecked the dvd files before authoring they were fine. Anyone tell me what I,m doing wrong, I've never had this problem before.