Easy hitTest question

Hi all!

I´m creating a menu block that I want to change the opacity on when I mouse over the whole block. When I mouse out I want it to change it´s opacity back again.

It works when I mouse over the block but nothing happens when I mouse out.

onClipEvent (enterFrame) {

    if (this.hitTest(_root._xmouse, _root._ymouse, true)) {
        trace(_root.once);
        if (_root.once == true) {
            this.gotoAndPlay("starta");
            _root.once = false;
            trace(_root.once);
        }
        else {}
    } else if (this.hitTest(_root._xmouse, _root._ymouse, false)) {
        this.gotoAndPlay("stopp")
        trace("Stop")
    }
}