Animated buttons

hey im trying to make buttons that are animated… on mouse over have the button animated bigger, on mouse out button shrinks down. i figured out how to do this using MC’s but when i tried to apply my actions script to make them load my Mc’s (pages) nothing happened. here is my action script.

on (rollOver) {
this.gotoandplay(2);
}
on (rollOut) {
this.gotoandplay(21);
}

onClipEvent (mouseUp) {
if (_root.currMovie == undefined) {
_root.currMovie = “contact”;
container.loadMovie(“contact.swf”);
} else if (_root.currMovie != “contact”) {
if (container._currentframe>=container.midframe) {
_root.currMovie = “contact”;
container.play();
}
}
}

what is wrong or am i approaching this all wrong?