720p on panasonic ae900u not working with mythdora 3.2

I was able to get a perfect 720p display when I used ubuntu dapper but when I changed to mythdora 3.2 (which is based on fc5) I can’t get a modeline that will correctly display.  For some reason every modeline I try make the bottom bar not show on the screen.  If I move the mouse down the screen scrolls and I can see the bar.  I have tried every modeline I could find.  Still working on it but can’t seem to find a modeline that will work so far.  The projector always says 720wide but it just doesn’t show correctly.