I insert my audio track onto my music track. I double click on the audio selection and then press trim audio. I play the song until I get to the point I want to start and then I press the far right arrow to trim. Then I press OK. This puts my song on the music track and when I play it on my computer it is fine., When I burn the DVD, the song starts at the beginning of the song, not where I trimmed it. What am I doing wrong?