Loading page question

programming flash
1

I have added a url to open when a button is clicked, but when clicked; it opens my browser but no page comes up, can anyone help with this error?

this is my code:

function openWebPage(evt:Event):void {
navigateToURL(new URLRequest(“http://www.longshotgraphics.com/About.html”));
}

About_btn.addEventListener(“click”,openWebPage);