Loaded Bar and Scrubber Problem

Hi

I'm following the EXCELLENT tutorial on the EXCELLENT www.gotoandlearn.com web site about playing video through flash. I can get my movies to play and my rewind and play buttons are working lovely, but my loader bar and scruber do not move.

Can anybody se anything wrong in my code?

I have on stage a movie called loader (instance=loader) and within that movie I have a movie called loaderbar (instance=loaderbar) and a scrubber movie (instance=scrub)

Here is my code:

var nc:NetConnection = new NetConnection();
nc.connect(null);

var ns:NetStream = new NetStream(nc);

theVideo.attachVideo(ns);

ns.play("http://www.chrislewis.tv/test/hampers.flv");

rewindButton.onRelease = function(){
ns.seek(0);
}
playButton.onRelease = function(){
ns.pause();
}

var videoInterval = setInterval(videoStatus,100);
var amountLoaded:Number;
var duration:Number;

ns["onMetaData"] = function(obj){
duration=obj.duration;
}

function videoStatus(){
amountLoaded = ns.bytesLoaded/ns.bytesTotal;
loader.loadbar._width = amountLoaded * 313;
loader.scrub._x = ns.time / duration * 313;
}