Hi there, I guess the Label4 object is null, and you cannot access the Text property. How do you get reference to the label declared in the header of the repeater control? Because the Label is placed inside the repeater control, so you cannot simply add the declaration for the control in code-behind as you would with other controls placed in the web page. In this case, you can create an event handler for the ItemDataBound event of the repeater, then look for the label placed in the header item using the FindControl method. Once you have reference to to the label, you then can assign a value to the Text property.