I have a project file with three sequences for three different scenes for a movie I am working on. I just got done editing the 3rd scene and decided to to go back and review my other sequences. However, I get no sound from either of them. They both worked before, and the one I have been editing on works. All audio is checked on and good to go. Nothing was changed since last the time I was working with them. Any reason why sound would come from one sequence and not another?