Recently I bought Sony Blu-ray player. It plays blu-ray discs with no problem, both studio-recorded and myself recorded. The problem is in plying DVD discs, it plays only DVDs from workshop (studio-recorded), if I burn my own video disc via Nero Burning ROM, my Blu-ray player does not recognize it showing message like 'wrong format'. In the same time this discs are playable in any other DVD player I'm able test them on. When I burn them I select option 'Video DVD disc' in Nero Burning ROM, it creates 2 appropriate folders in the root of the disc. What might be reasons for this?