How to upload file with progress bar using AJAX UpdatePanel UpdateProgress in ASP.Net

Hello,

I have a wep page. Its consists of some  controls along fileupload controls. 

My page Fully placed into UpdatePanel.

when i press the submit all contols values and file upload file should be stored into back end.

i used vs2008 framework 3.5.

Note: for fileUploading perpose i should write trigger with postback on submit button.

while processing the submit button action i want to show some processing (progressing) controls like round rotation like..

how can i achieve that.

shall i place on ajax toolkit 4.0 instead of 3.5.

thanks in advance.