[ Movies ] Open Question : just put in ilife 11 on my mac and opened movie but can't see the video part in the corner even when I export?

I just wanna know if any one can help me with that. I can see the images and videos in the editing part but the in top right corner where i'm suppose to see the preview its black and if I export it in a MOV format its still black but i can hear the music.

Source: http://answers.yahoo.com/question/index?qid=20110211120056AAg2y4W

Britney Spears Justin Timberlake Halle Berry