Working with Adobe AIR FileSystem API on iPad

Recently I made some test on iPad to test how to update contents of my mobile applications.
I tried some new AIR 2 API like open default program with PDF or XLS files but I get error #3000 (privileges error).
My idea is to create a routine where I’ll be able to update all contents on my application without passing trough Apple store.
So I tried with URLStream and AIR filesystem API, everything works well.
Code is so easy, take a look here:

//RETRIEVING IMAGE FROM ANY WEBSERVER
var urlS:URLStream = new URLStream();
urlS.addEventListener(Event.COMPLETE, downloadComplete);
urlS.addEventListener(ProgressEvent.PROGRESS, showPerc);
urlS.load(new URLRequest("http://192.168.1.9:8888/oliviaWilde.jpg"))

//DOWNLOADED IMAGE BYTEARRAY AND LOADING IN LOADER
function downloadComplete(e:Event):void {

  perc_txt.text = "";
  fileData = new ByteArray();
  urlS.readBytes(fileData,0,urlS.bytesAvailable);
  bytes = urlS.bytesAvailable;
  l.loadBytes(fileData);
  l.addEventListener(MouseEvent.CLICK, saveIt);

}
//SAVE IMAGE INTO APPLICATIONSTORAGEDIRECTORY
function saveIt(e:MouseEvent):void{

  f = File.applicationStorageDirectory.resolvePath("a.jpg");
  var fs:FileStream = new FileStream();
  fs.open(f, FileMode.WRITE)
  fs.writeBytes(fileData);
  fs.close();

}

//LOAD IMAGE FROM APPLICATIONSTORAGEDIRECTORY 
function loadLocalImg(e:MouseEvent):void{

  var finalBA:ByteArray = new ByteArray();
  var fs:FileStream = new FileStream();
  fs.open(f, FileMode.READ);
  fs.readBytes(finalBA, 0, bytes);
  fs.close();
  l.loadBytes(finalBA);

}

Using applicationStorageDirectory, you can save data into your application and retrieve it with AIR API.
In the video below, you can see a little demo where I load an image from a server, I save it, I unload click on the black right button and finally I load again but from ApplicationStorageDirectory, with the black left one, instead of loading from webserver.