ModalPopupExtender Doesn't Recognize TargetControlID

Jan 19, 2012

I am getting an error when i call the button id which is inside GridView Item template.

Error: "The TargetControlID of 'mpueResend' is not valid. A control with ID 'btnResend' could not be found."

Code:
AlternatingRowStyle-BackColor="#EDF3F7" HeaderStyle-CssClass="gridbgheading"
Width="100%" HeaderStyle-HorizontalAlign="Center" >

Code:
BackgroundCssClass="modalBackGround" DropShadow="true" CancelControlID="btnCancelR" >

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