Levels and movie holder help

hay,
i was doing tutorial from the page
http://www.kirupa.com/developer/mx2004/transitions2.htm
and litlle stuck.

my problem is that I have in main timeline movie1, who have movie2
in side, and movie2 have movie3 inside it.
in movie3 is buttons like in the tutorial.
so i try to replace _root with _level2 but dosn`t work on mouse
button AS.

on (release) {
if (_level2.currMovie == undefined) {
_level2.currMovie = “section1”;
container.loadMovie(“section1.swf”);
} else if (_level2.currMovie != “section1”) {
if (container._currentframe >= loadinto.midframe) {
_level2.currMovie = “section1”;
loadinto.play();
}
}
}

where I go wrong.
if someone please explain to me, I try to figure it out for
a past 6 days and can`t.

thx
maki