Problem displaying duration time Netstream

programming flash
1

I have a flv in my netstream. Somehow I cannot show the duration correctly. I have read forums and tried their ways, still no luck.

this part is in my constructor --------
//load video
var connection:NetConnection = new NetConnection();
connection.connect(null);
stream = new NetStream(connection);
stream.play(“video.flv”);
video = new Video();
video.attachNetStream(stream);
addChild(video);

        //caculate video duration and initial cuepoint event 
        //handle function
        var client:Object = new Object();
        client.onMetaData = onMetaData;
        client.onCuePoint = onCuePoint;
        stream.client = client;
       
        //create playback time info.
        playbackTime = new TextField();
        playbackTime.width = 50;
        playbackTime.height = 20;
        this.addEventListener(Event.ENTER_FRAME, handleEnterFrame);

then the functions

    private function onMetaData(data:Object){
        duration = data.duration;
        trace(duration);
        //resize video, video.width may not equial to video.videoWidth
        video.width = video.videoWidth;
        video.height = video.videoHeight;
        //setup playtime info.
        setPlaybackTime();
        //setup subtitle
        setSubtitle();
    }
    
    /*
     * keep checking the playback time
     */
    private function handleEnterFrame(event:Event):void {
        playbackTime.text = Math.round(stream.time) + " / " + Math.round(duration); 
        trace(stream.time);
    }

my duration time keeps showing 10. the elapsed time is ok.

Can someone help?

Thanks