ActionScript 3.0 :: Trying To Make Movie Play On Mouse-over?

Trying to make movie play on mouse-over; then with option to click URL; then if no click, mouse-out, second movie plays. I can make first part work:

import flash.events.IEventDispatcher;
import flash.display.MovieClip;
carout.stop();
startbutton.addEventListener(MouseEvent.MOUSE_OVER ,startclip);
function startclip(e:MouseEvent):void {
carout.play();
}

But not second (URL click) and third part (mouse-out, second movie plays).