title: Flex access of undefined property EVENT
body: <p>I am working in Flex Builder 3 and I am trying to figure out this error. The error console reads "Access of undefined property EVENT."  I am not understanding why this error is showing when I have already imported flash.events.Event.  Flex is not recognizing with even the hinting helper pop up that appears when I type the addEventListener( .  It should appear after the opening parenthesis right?  Also, I cleaned the targets and still no luck.  Thanks!</p>
  
  <pre><code>package {
  
      import flash.display.Sprite;
      import flash.events.Event;
  
      public class testing extends Sprite
      {
          public function testing()
          {
              addEventListener(EVENT.ENTER_FRAME, loop);
          }
          private function loop(e:Event):void
          {
          }
      }
  }
  </code></pre>