Ajax-Update Panel Issue

Question

Hi,
We have a Webform on which we have multiple controls(ListBox,TextBox, Ajax HTML Editor,FileUploader).
We have used Ajax Update Panel to stop page refresh(Postback)) because we are copying Items from 1st Listbox to another on button click. We are sending an email with attachment(FileUploader) on another button click.
The issue is File Uploader does not work inside Update Panel. It doesnt not remember the path.
Is there a way to make it work?

Thanks
Cien