Flash :: Selectively Mask Parts Of The Stage?

I'm making flash game, and I have the staged masked so your character can only see part of it. However, I don't want the entire stage masked, I only want the "Game Area" masked. Imagine my stage is 800x800. However, the "Game" only takes up the area at the top, 800 by 600. There are 200px at the bottom where I can use for chatting, or displaying information, as your character walks around the game area.

The issue is, I setup my mask, and it masks /everything/ on stage. Even if I have something outside the "game area", it is still hidden behind the mask. So my question is, in my flash application, how can I use my mask in the "game area", and not have other parts of my application affected? Can I selectively put items above the mask?

Edit: Clarifying. My game starts by initialzing the GameScreen object:
game = new GameScreen(); //800 x 600. Declared as class variable
game.y = 40;
addChild(game);

[Code]....

So now, we have my game setup, with a circular hole in the mask and the player can see his character. However, also when the Game Screen object initializes, it places an infomation bar on the screen. This information bar also gets hidden by the mask. The player cannot see it. The issue is, I want this bar (and other components to be added later) to be visible to the player at all times. I can't simply change the shape of the "hole" through the mask, because it moves with the player. So how can I allow that information bar to be seen by the player, while still hiding the game area?