Hi. I'm new to making movies. I imported two clips from SAM animation. Well, actually, I exported them from SAM animation to my documents folder. Then I went into imovie and imported the clips. The clips had the "dot mov" at the end. They both imported fine into imovie. However, now I have a thin red line going across the bottom of both clips. I don't know what that line is for. Also, the transition between the clips won't complete. When I play the movie from the beginning, it gets stuck on the transition part. Why? How can I fix these problems? I would appreciate any and all help I can get. Thank you.