ActionScript 3.0 :: Face Book API - Error 200 When Posting In Wall?

HI'm using the "PublishPost" method form the "AS3/Facebook API" to publish in the current user wall, but Facebook returns me a code:200 "Permissions Error", I'm just using the simple following code:
 
1. --------------------------------------------------------------------- -----------------------------------session = new FacebookSessionUtil( this.API_KEY, this.SECRET_KEY, this.scope.loaderInfo );fbook = session.facebook;session.verifySession();
 
2.PostTool.postInWall( fbook );
 
3. (inside a PostTool class)
 
static public function postInWall( fbook:Facebook, message:String = "... Testing..." ):void {
 
var post:PublishPost = new PublishPost( message );   var call:FacebookCall = fbook.post( post );   call.addEventListener( FacebookEvent.COMPLETE, completeHandler );    }[code].....