Preloader in un filmato esterno al principale

[Aura]

on(load) {
if(_root.getBytesLoaded() < _root.getBytesTotal()){
_root.stop();
//load Movie Behavior
loadMovieNum("preloader.swf",_root);
}
else
if(_root.getBytesLoaded() == _root.getBytesTotal()){
_root.play();
}