Compressor 3.5.3 problem with green bar around my frame

Hi, I have the following problem. I have to create a dvd, so i choose to sent my material (which is 1080i) from fcp 7 to compressor 3. I select the choice where you create dvd 90 minutes best quality. Then I'm going on the tab quality and I rase the bit rate of my video because I want the best quality and my video is less than 30 minutes. When I submit this export the video that I have is an m2v with a thin green bar on my up, left, right and down side of my frame for my whole video. Do you have any solution to remove this green bar?

sorry if there is already a post about this problem but i didnt find any.