Button in loaded swf controlling stuff in loading swf?

I got a swf that loads various other .swfs. I’m trying to make a button inside the loaded swf that will load another swf in its place.

The script I used is:

[AS]this.invbut.onRelease = function() {
loadMovie(“pages/frost.swf”, “stageloader”);
};
[/AS]

I’ve tried using _root.loadMovie(), _level0.loadmovie()(this replaces everything and dispays just the loaded swf). But neither worked.

Heres an image I made to try and explain things:

thanks!