How to write an image to application directory using AIR?

programming flash
1

I’m trying to save an image to the application directory by opening a file stream and write the bytes from a bitmap data. I added some events listeners for testing the file stream process but I don’t receive any response event. Can you take a look over my code and tell me where might be the problem.

  
            var bd:BitmapData = new BitmapData(CANVAS_WIDTH, CANVAS_HEIGHT);
            bd.draw(currentDrawing);
[LEFT]            var jpgEncoder:JPGEncoder = new JPGEncoder(100);
            var ba:ByteArray = jpgEncoder.encode(bd);
            
            var newImage:File = File.applicationDirectory.resolvePath("images/test.jpg");  
            var fileStream:FileStream = new FileStream();  
            fileStream.open(newImage, FileMode.UPDATE);  
            fileStream.writeBytes(ba); 
            fileStream.addEventListener(Event.CLOSE, fileClosed);  
            fileStream.addEventListener(Event.COMPLETE, fileComplete);  
            fileStream.addEventListener(IOErrorEvent.IO_ERROR, fileError); 
            fileStream.close();
            
            
            function fileClosed(event:Event):void {  
                outputText.text = "close";
            }
            
            function fileComplete(event:Event):void {  
                outputText.text = "complete";
            } 
            function fileError(event:IOErrorEvent):void {  
                outputText.text = "error"; 
            } [/LEFT]