Hi, After trying both the MS FileUpload and AsyncFileUpload controls and not getting my scenario working I though I'd try this control.  I have got further but there are still issues. I am using ASP.NET 4.0 Beta 2 webforms (I have repro'ed all the below on ASP.NET 3.5) and IE8 and Firefox 3.7. 1.  In AJAX mode I get an ...