Question on image uploading

Why is it image is not uploading when im running on swf version, but image uploading works when im running the exe version of the flash project?

And how can i add a progress bar to check if the image is uploading or not? Oh yeah, im new at actionscript so please go easy on me.

anyway here’s the code.

import com.adobe.images.JPGEncoder;

var jpgSource:BitmapData = new BitmapData (container_mc.width, container_mc.height);

var jpgEncoder:JPGEncoder = new JPGEncoder(85);
var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);

Save.addEventListener(MouseEvent.CLICK, save);
function save ($event:MouseEvent) {
var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
var jpgURLRequest:URLRequest = new URLRequest("jpg_encoder_download.php?name=sketch.jpg");
jpgURLRequest.method = URLRequestMethod.POST; = jpgStream;
navigateToURL(jpgURLRequest, "_blank");

// listen to button
image_button.addEventListener (MouseEvent.MOUSE_DOWN, load_image);

// load image
function load_image(event:Event):void
    var imageLoader:Loader = new Loader;
    imageLoader.load (new URLRequest(image_string.text));
    imageLoader.contentLoaderInfo.addEventListener (Event.COMPLETE, imageLoaded);

// load image
function imageLoaded(event:Event):void

And how can i say to image_mc to load the jpeg at the center of image_mc’s axis. So that when i flip the image, the image will flip vertically at the center?

Do i make sense? sorry for my bad english >.<

Thanks a lot.