Lỗi chứng thực Trong server 2003

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trong quá trình hoạt động của server 2003 en chạy web app asp.net gap lỗi như sau làm treo toàn bộ dịch vụ .sau đây là toàn bộ nội dung


eventEvent code: 3005 Event message: An unhandled exception has occurred. Event time: 12/18/2009 856 PM Event time (UTC): 12/18/2009 156 PM Event ID: 4c81926fbefc489f92f0dd5a3d96ce65 Event sequence: 68 Event occurrence: 1 Event detail code: 0 Application information: Application domain: /LM/W3SVC/1/Root/Sammy-Website-1-129056166151243750 Trust level: Full Application Virtual Path: /Sammy-Website Application Path: D:\GloboneSolution\Sammy-Website\ Machine name: SQL Process information: Process ID: 4140 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE Exception information: Exception type: Exception Exception message: Appointment is invalid: Start time must be before the End time. Request information: Request URL: http://192.168.49.2/sammy-website/Da...oThoiGian.aspx Request path: /sammy-website/DatPhong/SoDoPhongTheoThoiGian.aspx User host address: 192.168.49.61 User: SQL\website Is authenticated: True Authentication Type: NTLM Thread account name: NT AUTHORITY\NETWORK SERVICE Thread information: Thread ID: 5 Thread account name: NT AUTHORITY\NETWORK SERVICE Is impersonating: False Stack trace: at Telerik.Web.UI.Appointment.Validate() in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\Appointment.cs:line 666 at Telerik.Web.UI.RadScheduler.PerformDataBindingFrom Provider(IEnumerable`1 providedAppointments) in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\RadScheduler.DataBinding.cs:line 31 at Telerik.Web.UI.RadScheduler.PerformSelect() in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\RadScheduler.DataBinding.cs:line 165 at System.Web.UI.WebControls.BaseDataBoundControl.Dat aBind() at System.Web.UI.WebControls.BaseDataBoundControl.Ens ureDataBound() at Telerik.Web.UI.RadScheduler.EnsureDataBound() in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\RadScheduler.DataBinding.cs:line 198 at Telerik.Web.UI.RadScheduler.CreateChildControls(Bo olean bindFromDataSource) in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\RadScheduler.cs:line 910 at Telerik.Web.UI.RadScheduler.CreateChildControls() in e:\Download\NET\Telerik-2009Q1\TelerikControls2009_mix\ASP.NET AJAX\RadControlsAjaxSource\Telerik.Web.UI\Schedule r\RadScheduler.cs:line 901 at System.Web.UI.Control.EnsureChildControls() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Custom event details: For more information, see Help and Support Center at

mong các thầy các bạn chỉ giáo !