Actionscript 2 shooting

1

I tried this to make a thing called bullet spawn, then move, but it never spawns. Heres my code:

if (Key.isDown(Key.UP)) {
attachMovie(“bullet”, “bullets”, 1);
bullets._x = player._x + 20;
bullets._y = player._y - 10;
}
function updateBullet() {
bullets._x += 2;
}
updateBullet();

Thanks for the help.