Aplicativo Facebook

Alguém aqui já fez algo pra facebook?

Estou seguindo o tutorial do site da adobe: http://www.adobe.com/devnet/facebook/articles/video_facebook_quick_start.html

Mas eles usam MXML e eu to fazendo em action script 3 mesmo, usando Flash Develop + Flex SDK 4.1

Só que estou tendo erro quando tento compilar. Na verdade nem é erro, eles simplesmente não compila e manda uma mensagem no rodapé do Flash Develop: "Build Failed"

Alguém consegue identificar onde está o erro?

//----------------------------------------------------------------------------------------------------//
// //
// //
// SKIDUN COPYRIGHT 2011 //
// //
// //
//----------------------------------------------------------------------------------------------------//

package
{
/**
* Facebook Test
* @author André Rodrigues
* Since: 04.04.2011
*/

//************************************************************
// Import Action Script 3 Classes
//************************************************************

import flash.display.MovieClip;
import flash.events.MouseEvent;

//************************************************************
// Import External Libraries
//************************************************************

import LogInButtonSprite;
import com.facebook.graph.FacebookDesktop;

//************************************************************
// DocumentClass
//************************************************************
public class DocumentClass extends MovieClip
{
//************************************************************
// Constants
//************************************************************

	static public const STAGE_WITDH : uint = 600;

	static public const STAGE_HEIGHT : uint = 480;

	//************************************************************
	// Properties
	//************************************************************

	private var teste : String = 'teste'; //Apenas para testes de trace, apagar no fim do projeto

	private var _button : LogInButtonSprite;

	private var _currentState : String;

	private var _userThumb : UserImageSprite;

	//************************************************************
	// Contructor
	//************************************************************
	public function DocumentClass()
	{
 startDraw();
	}

	//************************************************************
	// Private Methods
	//************************************************************

	//Initiate the aplication
	private function startDraw() : void
	{
 _button = new LogInButtonSprite();
 _button.x = ( STAGE_WITDH - _button.width ) * .5;
 _button.y = ( STAGE_HEIGHT - _button.height ) * .5;
 _button.buttonMode = true;
 this.addChild( _button );
 _button.addEventListener( MouseEvent.CLICK , doLogin );

 _userThumb = new UserImageSprite();
 this.addChild( _userThumb );

 _currentState = 'login';

 init();
	}

	private function init() : void
	{
 FacebookDesktop.init( "my_code" , loginHandler );
	}

	private function doLogin() : void
	{
 FacebookDesktop.login( loginHandler , {} );
	}

	private function loginHandler( session : Object , fail : Object ) : void
	{
 if ( session != null)
 {
 _currentState = 'main';
 _userThumb.source = FacebookDesktop.getImageUrl( session.uid , 'large' );
 _userThumb.txtField.text = session.user.name;
 }
	}

	//************************************************************
	// Protected Methods
	//************************************************************

}
}

* É claro que onde está "my_code" eu coloquei o código do meu aplicativo no facebook.

NINGUÉM pra ajudar?