Buttons within masked mc

Ok, here is the issue. I have a masked infinite menu on the stage that loads an external file in a seperate container when a button is clicked. It works fine regularly.

However, I would like to make the menu disappear when the mouse is not over the masked portion. When I include the actionscript to do so, it works just fine, but the buttons become disabled. They no longer work.

I think once this is figured out, I will incorporate a fade in and out on the menu rollovers as well, so if ya’ll have a solution and can easily incorporate that, it’d be much appreciated. However, I am just mainly concerned with getting this fixed.

I have uploaded a stripped down version of the fla so that you can see what I mean.