It is quite unusual that the design-view or the smart tag does not work since it worked properly at my side in the project that I sent you. Yet I would like to confirm that event without working design time our controls have all their functionality working properly in Source-View and if you set the mouse cursor on the mark up of the control and press F4 its properly window is shown and ready for easy update.
Hope this will be helpful.
All the best,
the Telerik team
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