Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Unknown server tag 'ajaxToolkit:ModalPopupExtender'.

Source Error:


Line 33: 									</tr>
Line 34: 								</table>
Line 35: 								<ajaxToolkit:ModalPopupExtender ID="ButtonCalendar1_ModalPopupExtender" runat="server" BackgroundCssClass="modalBackground" CancelControlID="LinkButtonCancel" DropShadow="True" DynamicServicePath="" Enabled="True" PopupControlID="PanelSelectPeriodDialog" TargetControlID="ButtonCalendar1" OnOkScript="selectPeriodDialog_onok()">
Line 36: 								</ajaxToolkit:ModalPopupExtender>
Line 37: 							</td>

Source File: /Clubs/Club/Tournaments/default.aspx    Line: 35


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0