[HttpException (0x80004005): Multiple controls with the same ID '_header' were found. FindControl requires that controls have unique IDs.]
System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) +392
System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) +244
System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) +244
System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) +244
System.Web.UI.Control.FindControl(String id, Int32 pathOffset) +496
System.Web.UI.WebControls.DataBoundControlHelper.FindControl(Control control, String controlID) +112
System.Web.UI.WebControls.Repeater.ConnectToDataSourceView() +782
System.Web.UI.WebControls.Repeater.OnLoad(EventArgs e) +24
System.Web.UI.Control.LoadRecursive() +68
System.Web.UI.Control.LoadRecursive() +162
System.Web.UI.Control.LoadRecursive() +162
System.Web.UI.Control.LoadRecursive() +162
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785