Loading and duplicating a MovieClip (using Senocular Tip of The Day)

I am trying to load an external swf (AS3) in an AS3 application, using basically a duplicateMovieClip() function from the “Tip of The Day” (the loaded swf should appear in several places in the Container - each with its own timeline - that is, I want to be able to play() ant stop() them independently); ofcourse, I’m trying to avoid loading the same file multiple times.

The problem is that it doesn’t work. This is the code, and I would appreciate any suggestions:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" applicationComplete="main()" width="500" height="500">
    <mx:UIComponent id="spriteHolder"/>
            public var swfCovers:Array = new Array;
            public function main():void{
                  var swfLoader:Loader = new Loader;
                swfLoader.load(new URLRequest("assets/Slave.swf"));
                swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, addSwf);

                function addSwf():void{
                    var i:Number;
                    for(i=0; i<4; i++){
                        swfCovers* = MovieClip(duplicateDisplayObject(MovieClip(swfLoader.content)));
                        swfCovers*.x = i * 100;
                        swfCovers*.y = i * 100;

                function duplicateDisplayObject(target:DisplayObject):DisplayObject {
                    // create duplicate
                    var targetClass:Class = Object(target).constructor;
                    var duplicate:DisplayObject = new targetClass();
                    // duplicate properties
                    duplicate.transform = target.transform;
                    duplicate.filters = target.filters;
                    duplicate.cacheAsBitmap = target.cacheAsBitmap;
                    duplicate.opaqueBackground = target.opaqueBackground;
                    if (target.scale9Grid) {
                        var rect:Rectangle = target.scale9Grid;
                        // Flash 9 bug where returned scale9Grid is 20x larger than assigned
                        rect.x /= 20, rect.y /= 20, rect.width /= 20, rect.height /= 20;
                        duplicate.scale9Grid = rect;
                    return duplicate;
                }// endfunc duplicateDisplayObject()



Behavior: with a swf created in Flash CS3, FlashPlayer simply crashes; with a swf created in Flex 2.0, nothing appears on screen, no error messages given.
This is a simple swf in Flex:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">

<mx:Panel title="My Application" width="186" height="300">
    <mx:Label text="Welcome to Flex!" mouseDownEffect="WipeRight"/>