byte Arrya to bitmap

i m trying to make a drawing application. in this i have to save my drawing to server and after some time i can reload it in flash in editable format.

i am using jpgenoder for encoding than convert that bytearry to base64 encodede string than i send it to server .

but when i reload that bytearray in flash it uneditable So plz can u tell me how to reload that bytearry in editable form

in am using this code

  public function sendToServer():String {
   var canvasBmp:BitmapData=new BitmapData(_canvasWidth,_canvasHeight,false,0xFFFFFFFF);
   canvasBmp.draw(container);
  var jpgEncoder:JPGEncoder=new JPGEncoder(80);
   var jpgStream:ByteArray=jpgEncoder.encode(canvasBmp);

   var byteArrayAsString:String=Base64.encodeByteArray(jpgStream);

   return byteArrayAsString;

  }

  public function drawingCanvas(xml) {
   xmlLoader = new URLLoader();
   xmlData= new XML();
   xmlLoader.addEventListener(Event.COMPLETE, onComplete);
   xmlLoader.load(new URLRequest("test1.xml"));
  }

  public function onComplete(event:Event) {

   testtxt2.text=event.target.data;
   _xmlResponse=new XML(event.target.data);
   readXMLData(_xmlResponse);

  }

  public function readXMLData(xml) {
   id=xml.@ID;
   status=xml.@Status;
   Owner=xml.@Owner;
   canvasData=xml.@canvas;
   for (var i=0; i<3; i++) {
    _layerId=xml.Layers.Layer.@id;
    _OccupiedBy=xml.Layers.Layer.@OccupiedBy;
    _HashValue=xml.Layers.Layer.@HashValue;
    _layerContent=xml.Layers.Layer;
   

   }
  
  
   var decodeStr:String=_layerContent[0].toString();
   var byteArr:ByteArray=Base64.decodeToByteArray(decodeStr);
   loader = new Loader();
   loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onImageLoaded);
   loader.loadBytes(byteArr);

  }

  public function onImageLoaded(e:Event):void {

   container.addChild(loader);
   testtxt2.text+="\n loader.height"+loader.height;

   trace(loader.width + " : " + loader.height);

  }