Problems with accessing FlashVars via parameters in AS3

package myPackage {
 import flash.display.Loader;
 import flash.display.LoaderInfo;
 import flash.display.Sprite;
  public class myClass {
	public function CTrafficHandler() {
		var myVar:String = LoaderInfo(this.root.loaderInfo).parameters.myFvar;}}}

public class myClass extends Sprite {

package
{
    import flash.display.Sprite;
    import flash.events.Event;

    public class MySprite extends Sprite
    {
        // constructor
        public function MySprite()
        {
            super();
            addEventListener( Event.ADDED_TO_STAGE, onAddedToStage, false, 0, true );
        }

        private function onAddedToStage( event:Event ):void
        {
            removeEventListener( Event.ADDED_TO_STAGE, onAddedToStage );

            var paramList:Object = LoaderInfo( this.root.loaderInfo ).parameters;
            var myParam:String = paramList["myParam"];
        }
    }
}