I thought I was doing a simple DVD burn. I videotaped 5 mini-movies and I created a DVD using 5 menus. I made no changes to the video clips. I just dragged them into the Roxio software and burned the DVD. The DVD burned with no errors. When I played the burned DVD, the video played normally but the music was at least double time. I tried burning it twice and both DVDs were the same. What can I do to fix this problem? Thanks!