Flvplayback component not progressively downloading

This has me flummoxed. Please help.

My video files are not playing progressively off the host server. They do in simulate download:

Here’s the code for one simple module that plays 3 different f4v’s on radio buttons. In theory they should stream progressively in a flvplayback instance called qualtestplayer when a radio button is pushed. But they fully download before starting to play.


import flash.display.DisplayObject;
import flash.display.MovieClip;
import flash.display.Loader;
import fl.video. *;
import fl.controls.RadioButton;
 

stop()
import fl.video.VideoPlayer;
 
var film:String = "";
qualtestplayer.source = "test_1500.f4v";
 
highrez.addEventListener(MouseEvent.CLICK, clickHandler1);
function clickHandler1(event:MouseEvent):void {
    qualtestplayer.source = "test_1500.f4v";
    qualtestplayer.play();
    
}
 
dvd.addEventListener(MouseEvent.CLICK, clickHandler2);
function clickHandler2(event:MouseEvent):void {
    qualtestplayer.source = "test_1200.f4v";
    qualtestplayer.play();
}
 
lowq.addEventListener(MouseEvent.CLICK, clickHandler3);
function clickHandler3(event:MouseEvent):void {
    qualtestplayer.source = "test_400.f4v";
    qualtestplayer.play();
}
 
//THIS CODE GETS AROUND THE PROBLEM OF SKIN LOCATION//
var url:String = LoaderInfo(MovieClip(this).loaderInfo).url
var index:int = url.lastIndexOf("/");
if (index < 0)
index = url.lastIndexOf("\\");
if (index > 0)
qualtestplayer.skin = url.substring(0, index+1) + qualtestplayer.skin;
 
qualtestplayer.addEventListener(VideoEvent.STOPPED_STATE_ENTERED, completeHandler);
function completeHandler(event:VideoEvent):void
    {
        
        if (stage.displayState == "fullScreen")
            {
                stage.displayState = StageDisplayState.NORMAL; 
            }
            
    }