ComboBox in SharePoint 2010 - Callback error

[Larkin]

I am using a RadComboBox control in a SharePoint 2010 visual web part with Load-On-Demand enabled (server-side ItemsRequested event), but I am getting a client error "There was an error in the callback" when I set focus to the combobox or if I type a letter in the textbox. With debugging enabled I can see the user control's Page_Load event being fired, but the ItemsRequested event is never fired. Any ideas as to why this is happening?

Thanks,
Larkin

[Kalina]

Hello Larkin,

Could you please explain your implementation in more details and paste here some working code to illustrate it?
Thank you.

Best wishes,
Kalina
the Telerik team