26bm 0 Newbie Poster

Hello, I am programming for the new(ish) 4 inch retina display of Apple's mobile products. Since I don't have a Mac computer to program with I've had to use Adobe Flash Professional. I realize that in order for the app to run in the full 4" I need to add a png image called Default-586h@2x. I have placed that in my assets library in AFP, but when I compile it still runs at the old screen size. I suppose I am missing a step, but am not sure what exactly. If anyone has the answer or any ideas/suggestions please let me know. Thanks, 26bm