ActionScript 3.0 :: FullscreenEvent Not Firing?

I have the following:A document class, extending from a custom class, extending from MovieClip. In my document class, I assign a handler to the FullScreenEvent like so:

Code:
addEventListener(FullScreenEvent.FULL_SCREEN, function(e) { toggle_fullscreen(); });

Also, I've set up a SimpleButton to call that same function, toggle_fullscreen, when clicked.Here's the catch:When I click the button, my app goes fullscreen. When I press Esc, the app goes back to normal but the FullScreenEvent doesn't get fired,so I can't catch it to re-align the elements on my stage.I've also tried to add the event listener to the stage object of my document class, but that doesn't work either.