Upload form with adUploadProgress on IIS - SharePoint 2010

Hi everyone,
I am trying to implement an upload form (sync/async) on SharePoint 2010 web site hosted on IIS 7. Both asp.net page and web.config are correctly configured and the web part runs with no error (I mean, the page loads, checkbox and select buttons work as expected).
However the uploading process on button click returns with the following message:

RadUpload Ajax callback error. Source url was not found:
Telerik.RadUploadProgressHandler.ashx?RadUrid=63d4f5ee-2777-4728-9467-bb7fbf5ca5e5
Did you register the RadUploadProgressHandler in web.config?

Is there something I miss? Is there some particular issue regarding IIS 7 and SharePoint?
I registered Telerik DLL (Telerik.web.ui) on web configuration file and the asp.net page includes the aforementioned DLLs.

Thanks in advance.
Regards

Giulio

Hi Giulio,

Please look at this post http://www.telerik.com/forums/configure-sharepoint-2010-web-application-for-telerik-controls It addresses the same problem.

I hope this helps.

Regards,
Hristo Valyavicharski
Telerik