Hello,
Thank you for submitting your query with ComponentArt Forum.
I would like to tell you that there is a similar known issue with defect # D5982 (description: "Client event ProgressUpdate is not raised") in our system. I have linked your forum with this defect. This bug will be reviewed by our development tracking team for a fix / workaround or some another solution. You will be automatically notified once the fix is available.
You may also refer the following forum link regarding the same:
<http://www.componentart.com/community/forums/p/46398/46398.aspx#46398>
Hope it helps you.
Thank you.
Lalit Gauba