createEmptyMovieClip on release ... problem

Hi all, i have a problem that i can’t find out how to solve:
i have an intro and a main_movie :
An index page, load first the intro using createEmptyMovieClip and so that intro have a button that contain another *createEmptyMovieClip (on release) *usedto load the 2nd main_movie on the stage.
I would like the intro disappear from stage when the main_movie have finish to load, but if i unload the MovieClip with **intro **also the main_movie isn’t displayed. I can understand that happen (??) because one is incapsulate on other, but i can find out how to solve in other way. Can someone help me in this.problem?