Hello RSC. Is the user connecting to the same client location as the
other users for whom it works?  Or did you deploy the client to a
different location for this user?  If you did deploy to a different
location, did you remember to also deploy the
Microsoft.Web.UI.WebControls too?  When I forgot this I had the same
result you are describing.

One thing was strange though.  In the development project, the folder
'webctrl_client' is placed in the wwwroot folder as per instructions
and it works.  But in the deployed project, the webctrl_client folder
had to be placed inside the client folder in order for it to work.
But no problems once that was done.

Hope this helps.  I am no expert on this stuff but this happens to be
something I have run across.  (I have plenty of problems of my own
regarding these web controls :)

Regards, Russ