Movie wont load

[davidbr]

Im trying to build a MovieClip containing MovieClips, but it wont work. The symbols in the library is linked properly. Any ideas?

this.createEmptyMovieClip("mc_menu", this.getNextHighestDepth());
mc_menu._x = 10;
mc_menu._y = 10;
mc_menu.attachMovie("gr_button_level_1", "top_button", this.getNextHighestDepth(), {_x:0, _y:0});
mc_menu.attachMovie("gr_button_level_1", "sub_button", this.getNextHighestDepth(), {_x:0, _y:30});

Thanks!