Need help with export from FCP to DVD
 

I shot a music video with the Panasonic HVX. I shot the whole thing in 720p using various frame rates and editied in Final Cut pro 5.0.4. I need to output to DVD for Delivery, but each time I do My Quicktime frame is squashed. When I hit info. it shows me that it is at 640 by 480. Why is this? I chose export to quicktime(the third choice from the top of the menu) and went to I manually put in the numbers, but it still exports it that way. Anyone had this happen to them and know how to fix it?