Using Advanced Layers way of accessing button but still not working

Even after using the correct way of accessing an object when Advanced Layers is ticked, I am not able to access the object. The comipler is not showing any errors but when testing, it won't even recognise the button as a button. It doesn't even change the cursor and when clicked, nothing happens.

stop();

GrowButton.home.addEventListener(MouseEvent.CLICK, start);

function start (event:Mouse event):void

{

      gotoAndPlay(105);

}