stop();

this.loaderInfo.addEventListener(Event.COMPLETE, initApplication);
this.loaderInfo.addEventListener(ProgressEvent.PROGRESS, showProgress);

http://livedocs.adobe.com/flash/9.0/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00000818.html

At least partly a solution, but you can work from there

i noticed that when you use addChild(), it doesn’t initialize the SWF the same way it would if it were being executed directly (the stage reference gets weird). So I used the ADDED_TO_STAGE event (however this causes the movie to initialize twice!), so I put in a flag to tell it to only initialize the one time and it worked!

i created a preloader flash movie has this code borrowed from http://www.gotoandlearn.com/play?id=85:

var l:Loader = new Loader();
l.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loop);
l.contentLoaderInfo.addEventListener(Event.COMPLETE, done);

l.load(new URLRequest(“main_content.swf”));

function loop(e:ProgressEvent):void
{
var perc:Number = e.bytesLoaded / e.bytesTotal;
percent.text = Math.ceil(perc*100).toString();
}

function done(e:Event):void
{
percent = null;
stage.addChild(l);
}

then in my “main_content” flash file, the document class I contains the following:

package {

public class main_content extends Sprite {

public function main_content() {
if(stage!=null) {
// file is running without the preloader
init();
} else {
// file is included by the preloader
addEventListener(Event.ADDED_TO_STAGE,init);
}
}

public function init(evt:Event=null) {
if(!inited) {
inited=true;
if(stage.numChildren==2) {
stage.removeChildAt(0);
stage.addChild(this);
}
}
// everything else here
}

}

Use a 3 frame main timeline to load any library assets, explained at:
http://www.8bitrocket.com/newsdisplay.aspx?newspage=10807

Here’s the catch. No matter what frame is specified in the publish settings, Flash will always load the following in the first frame: (1) any custom document class (along w/ any classes imported in that document class), and (2) any classes imported on the main timeline (regardless of which frame they’re imported on). The publish setting applies only to classes imported within MovieClips that are children of the main timeline. I tested this myself after reading it here:
http://summitprojectsflashblog.wordpress.com/2008/10/31/as3-class-export-frame-behavior/

So that means you have to contain your entire application within a MovieClip on the third frame (if using methods of the first link above). This clip could be assigned a class and treated like the root/document. Any classes you want to use during preloading on the first frame must be put in the real document class, or imported right on the main timeline in the first frame.

Stupid that preloading is such a problem, but this way you can deploy a single, self-contained swf with a preloader that works and is built with class files instead of messing with timelines and movieclips.

// Create a new Loader and URLRequest class
// Look at Flash’s help file to learn more
var l:Loader = new Loader();
var request:URLRequest = new URLRequest(“bigMovie.swf”);
// Now we assign a listener to fire when bytes are recieved which will run a function everytime this happens
l.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loop);
// Asign a listener and a function to the COMPLETE event to basically start our movie
l.contentLoaderInfo.addEventListener(Event.COMPLETE, done);
// Now load your external asset
l.load(request);
// Function to handle Preloader updating
function loop(evt:ProgressEvent):void {
var perc:Number = evt.bytesLoaded/evt.bytesTotal;
// I have a text field on frame 1 named percent to show download progress
percent.text = Math.ceil(perc*100).toString();
}

function done(evt:Event):void {
// We are done preloading so ditch the text field
removeChildAt(0);
percent = null
// Add our loader to the display list
stage.addChild(l);

}

You will of course want to include a Event.ADDED_TO_STAGE listener in there somewhere so your movie can instantiate itself somehow,someway.

You can thank our good friend Lee Brimelow (www.theflashbog.com) for this one. He has a very in depth video tutorial and I recommend you follow it.