[flexcoders] var circle:Sprite = new Sprite(); Not working

[brad.bueche]

I'm at a loss here.  I copied this code straight off the adobe site:
 
http://livedocs.adobe.com/flex/3/html/help.html?content=05_Display_Programming_29.html
 
And copied it write into a new mxml project (below) and Flex is throwing 1120 
erorrs saying "circle is undefined".  How can that be?
 
******************************************************************
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="absolute">
 <mx:Script>
  <![CDATA[
   import flash.display.Sprite;
   import flash.events.Event;
   import flash.events.MouseEvent;

   var circle:Sprite = new Sprite();
   circle.graphics.beginFill(0x990000);
   circle.graphics.drawCircle(50, 50, 50);
   circle.graphics.endFill();
   addChild(circle);

   function fadeCircle(event:Event):void{
      circle.alpha -= .05;
    
        if (circle.alpha <= 0){
           circle.removeEventListener(Event.ENTER_FRAME, fadeCircle);
        }
    }

    function startAnimation(event:MouseEvent):void{
        circle.addEventListener(Event.ENTER_FRAME, fadeCircle);
    }

    circle.addEventListener(MouseEvent.CLICK, startAnimation);
 
 ]]>
 </mx:Script>

</mx:Application>