Problem Controlling Loaded .swf

Hi, I'm new to AS3.0 and am having major difficulties controlling a loaded .swf file from my main class code (I have been successful controlling the .swf from timeline code, but want to be able to migrate to OOP-- it seems as though similar code just doesn't work from my main class).

I wanted the .swf loading code to be reuseable, so I created a MovieLoader class as follows:


ActionScript Code:
package _classes {
    import flash.display.*;
    import flash.net.URLRequest;
    import flash.events.Event;
   
    public class MovieLoader extends MovieClip {
       
        private var loader:Loader;
        // Initialize the loadedMovie variable which contains the loaded content from the URL
        private var loadedMovie:MovieClip;
       
        public function MovieLoader (url:String) {
            loader = new Loader();
            loader.contentLoaderInfo.addEventListener(Event.INIT, onInit);
            var urlRequest:URLRequest = new URLRequest(url);
            loader.load(urlRequest);
        }

        private function onInit (e:Event):void {
            loadedMovie = MovieClip(e.target.content);
        }
       
        public function getContent ():MovieClip {
            return loadedMovie;
        }
    }
}

The main class code that calls it is:

ActionScript Code:
package {
    import flash.display.*;
    import flash.net.*;
    import flash.events.*;
    import flash.text.*
    import _classes.*
   
    public class Map extends MovieClip {
        // Initialize the consoleLoader variable that will load console.swf
        private var consoleLoader:MovieLoader;
        // Initialize the console variable that refers the the console.swf content
        private var console:MovieClip;
       
        public function Map () {
            // Set Flash Player to "no-scale" mode
            stage.scaleMode = StageScaleMode.NO_SCALE;
           
            // Load console.swf
            consoleLoader = new MovieLoader("_assets/console/console.swf");
            console = MovieClip(consoleLoader.getContent());
            addChild(console);
            console.y = 100;
        }
    }
}

When I test it, I get the following runtime error message:

Quote:




TypeError: Error #2007: Parameter child must be non-null. at flash.display: DisplayObjectContainer/addChild() at Map$iinit()




This happens no matter how I write the code (most of which is taken directly out of Colin Moock's "Essential ActionScript 3.0"). What am I missing?

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