www.movie not playing?

I want to play a www movie on a 3dobject (a tv) once downloaded. The problem I'm having is that all I see on the object is the first frame of the movie. Nothing plays. Any ideas? This code is basically a cut and paste of this but replacing the guiTexture with a mesh (a plane).

 var url = "http://www.unity3d.com/webplayers/Movie/sample.ogg";
 var myScreen :GameObject;
 
 function Awake()
 {
     myScreen=gameObject;
     DontDestroyOnLoad(this);//temp
 }
 
 function Start () {
     // Start download
     var www = new WWW(url);
 
 // Make sure the movie is ready to start before we start playing
 var movieTexture :MovieTexture = www.movie;
 
 
 myScreen.renderer.material.mainTexture= movieTexture;

 while (!movieTexture.isReadyToPlay)
 {
     yield;
 }
 print("movie is ready to play!!");
 
 // Assign clip to audio source
 // Sync playback with audio
 audio.clip = movieTexture.audioClip;
 
 // Play both movie & sound
 movieTexture.Play();
 audio.Play();
 

}