When clicking on the header the a server error occurs inside the control. The following is the error thrown.

This action type is not supported: HeaderClick

Stack Trace

at DayPilot.Web.Ui.DayPilotCalendar.ExecuteEventJSON(String ea) at DayPilot.Web.Ui.DayPilotCalendar.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)