Escape key

1

Pressing ESCAPE key while in full screen mode, window gets smaller. How can I prevent it? This is my code:

stage.displayState = StageDisplayState.FULL_SCREEN;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
fscommand("trapallkeys", "true");
function keypress(event:KeyboardEvent)
{
	if (event.keyCode == Keyboard.ESCAPE)
	{
		gotoAndPlay("pause");
	}
}
stage.addEventListener(KeyboardEvent.KEY_DOWN, keypress);

Thanks…