unknown server tag 'telerik:RadDropDownTree'

[Ahmed]

there was a problem in RadDropDownTree control when i added it in the page

[Shinu]

Hi Ahmed,

This error occurs because you are using an older version of Telerik RadControls. The RadDropDownTree is introduced in the Q1 2013 (version 2013.1.220) release of RadControls suite. Please upgrade your RadControls to the latest version.

Thanks,
Shinu.