Kongregate Stats Problem

programming flash
1 

public function loadAPI()
        {
          var paramObj:Object = LoaderInfo(root.loaderInfo).parameters;
          var api_url:String = paramObj.api_path ||  "http://www.kongregate.com/flash/API_AS3_Local.swf";
          var request:URLRequest = new URLRequest ( api_url );
          var loader:Loader = new Loader();
          loader.contentLoaderInfo.addEventListener ( Event.COMPLETE, apiLoadComplete );
          loader.load ( request );
          this.addChild ( loader );
        }

I get a null reference error on this line:
var paramObj:Object = LoaderInfo(root.loaderInfo).parameters;

Anybody know what I should do. I was just following the tutorial to implement it. I don’t quit understand that part of the code so I cannot fix it myself. Do I have to download something for the api to work? Thanks a bunch. Hopefully this can be fixed tonight because I need to add highscores to my game.