Movie clip needs to be ABOVE another

I have one movie clip which I create on my timeline(movieA) and another that is created dynamically in actionscript(movieB).
When I run the movie, I want movieA to be on top of MovieB. Here is my actionscript:

_root.createEmptyMovieClip(“holder”, 14);

_root.holder.attachMovie(“movieB”, “movieB”, 15);

_root.holder.movieB._x=220;

_root.holder.movieB._y=115;

_root.movieA.setDepthAbove(_root.holder.movieB);

The call to setDepthAbove does nothing. MovieA is still below MovieB…

Any ideas what I’m doing wrong? I’ve torn my hair out over this for 2 days now :frowning: