Button problem, please help

Simple coding delima. In a perfect world

  1. you have a button that when clicked forwards you to a labeled frame and stops after the movie clip contained on that labeled frame concludes

I’ve tried hybrids of every bit of coding that I can get my hands on, but I’m missing something crucial in my understanding.

If you could, please, look at my example and tell me what’s wrong with this coding.

function gotolion(MouseEvent):Void {this.gotoAndPlay(“lion”);
lio_btn.addEventListener(MouseEvent.CLICK,gotolion );

Thank you so much!!!