How to disable buttons on lower level swf?

Hiya, I am learning loading movie clips dynamically using the loadMovieNum() function but have run into a problem.
When I load a movie into the next layer up from the current movie I still get the hand appearing over where the buttons from the movie on the lower level are (though the lower level movie and its buttons are not visible).

Is there any way I can stop this happening or am I going about things the wrong way?

Any help gladly received.

Thanks
Hectors