Problems with _xmouse and _ymouse in FF when scaling window

Hello,

I am trying to have a large flash movie inside a scalable window, where the window is smaller than the flash movie. The window scales, but the Flash does not.

You can see an example here:
http://myflashdesign.net/dev/mouseCoordTest.html

The movie is 2000x1200. Notice the _root._xmouse and _root._ymouse I have displayed in the upper left corner. In Internet Explorer, the top left corner is always 0,0. In Firefox, if I scale the window, the upper left corner is no longer 0,0 and is dependent on the size of the window.

I am wondering is there a way to avoid this. The movie itself has not moved, but the mouse is being interpreted as being in the wrong place.

-Bobby