.as instead of timeline

I have created a .fla with a timeline and layers that called external swfs (who in turn load xml data) and it worked fine, except that I lost the .fla code and had just the .swf code.

Found a website that decoded the .swf into a .fla and discovered what I have been looking for all the time, a way to code a timeline instead of drawing it out.

But now when I save the script as MovieClass.as, and call it from frame 1 of my .fla, not only do I not get any errors, but no output.

As per one forum that I did find, I did declare the Document class as MovieClass in the ActionScript Settings, but no joy.

Googling and searching the forums here has not proved fruitful.

My AS code

package
   {

   import flash.display.*;
   import flash.net.*;

   public dynamic class MovieClass extends movieclip {

        public var myLoader:Loader;
        public var url:URLRequest;
        public var my2ndLoader:Loader;
        public var url2:URLRequest;
        public var my3rdLoader:Loader;
        public var url3:URLRequest;
        public var my5thLoader:Loader;
        public var url5:URLRequest;
        public var my6thLoader:Loader;
        public var url6:URLRequest;
        public var my7thLoader:Loader;
        public var url7:URLRequest;

        public function MovieClass(){

            addFrameScript(1, this.frame2, 149, this.frame150, 299, this.frame300, 300, this.frame301, 448, this.frame449, 455, this.frame456, 604, this.frame605, 753, this.frame754, 1256, this.frame1257);

        }

        function frame2(){
            this.myLoader = new Loader();
            this.url = new URLRequest("RMCurrent.swf");
            this.myLoader.load(this.url);
            addChild(this.myLoader);
        }

        function frame150(){
            this.my2ndLoader = new Loader();
            this.url2 = new URLRequest("RMPrevious.swf");
            this.my2ndLoader.load(this.url2);
            addChild(this.my2ndLoader);
            removeChild(this.myLoader);
        }

        function frame300(){
            removeChild(this.my2ndLoader);
        }

        function frame301(){
            this.my3rdLoader = new Loader();
            this.url3 = new URLRequest("SPCurrent.swf");
            this.my3rdLoader.load(this.url3);
            addChild(this.my3rdLoader);
        }

        function frame449(){
            removeChild(this.my3rdLoader);
        }

        function frame456(){
            this.my5thLoader = new Loader();
            this.url5 = new URLRequest("SPStats.swf");
            this.my5thLoader.load(this.url5);
            addChild(this.my5thLoader);
        }

        function frame605(){
            this.my6thLoader = new Loader();
            this.url6 = new URLRequest("RMStats.swf");
            this.my6thLoader.load(this.url6);
            addChild(this.my6thLoader);
            removeChild(this.my5thLoader);
        }

        function frame754(){
            this.my7thLoader = new Loader();
            this.url7 = new URLRequest("rmsummary.swf");
            this.my7thLoader.load(this.url7);
            addChild(this.my7thLoader);
            removeChild(this.my6thLoader);
        }

        function frame1257(){
            removeChild(this.my7thLoader);
        }
    }

    }

//package MovieClass

frame one of MovieClass.fla

include "MovieClass.as";

MovieClass.as, MovieClass.swf and all the called swfs are in the same directory.

Are there any debug steps that i can do to troubleshoot this, or have i forgot something glaringly obvious?

Thank you