Flash CS3 : Button gotoAndPlay

stop();

nextButton.addEventListener(
 MouseEvent.MOUSE_UP,
 function(evt:MouseEvent):void {
   //trace(evt.target.parent.parent.name);
   evt.target.parent.parent.gotoAndPlay(11);
 }
);

modified from :

http://www.quip.net/blog/2007/flash/making-buttons-work-in-flash-cs3#comment-113406