button to other layer and .as listener

Hello,
I need to but one button into another layer (allContent). And if i click button then it loads from start. I tried to but button simply but .as cant listener this button. nothing happends.

Actionscript Code:

eng_btn.addEventListener(MouseEvent.CLICK, EngbtnPressed);
function EngbtnPressed(evt:MouseEvent):void{
  xmlURL = "xml/mains.xml";
  loadXml(xmlURL);
}
function loadXml(someURL:String):void{
xmlLoader.load(new URLRequest(xmlURL));
}