Embedding a URL into a swf

programming flash
1

I am trying to embed a URL into my swf file. I have placed an invisible button and given it the following actionscript:

function linkToSite(evt:MouseEvent):void {

     var url:String = "http://www.google.com";  // replace with your url

     var req:URLRequest = new URLRequest(url);

     navigateToURL(req, "_self");

}
urlBtn.addEventListener(MouseEvent.CLICK, linkToSite);

When I open the swf file the link doesn’t work. Can anyone help me? I have attached my files.

Thanks