お世話になります。
ASP.NETで作成したwebアプリケーションにて不定期に以下のエラーが発生します。
どなたか解決策をご存知でしたらご教示おねがいします。
2010/07/16 11:00:27,ArgumentException,値は null または空にできません
パラメータ名: handler,System.Web.Extensions,
場所 System.Web.UI.ScriptComponentDescriptor.AddEvent(String name, String handler)
場所 AjaxControlToolkit.ScriptObjectBuilder.DescribeComponent(Object instance, ScriptComponentDescriptor descriptor, IUrlResolutionService urlResolver, IControlResolver controlResolver)
場所 AjaxControlToolkit.ExtenderControlBase.RenderScriptAttributes(ScriptBehaviorDescriptor descriptor)
場所 AjaxControlToolkit.ExtenderControlBase.GetScriptDescriptors(Control targetControl)
場所 System.Web.UI.ScriptControlManager.RegisterScriptDescriptors(IExtenderControl extenderControl)
場所 System.Web.UI.ExtenderControl.Render(HtmlTextWriter writer)
場所 AjaxControlToolkit.ExtenderControlBase.Render(HtmlTextWriter writer)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer)
場所 System.Web.UI.WebControls.CompositeControl.Render(HtmlTextWriter writer)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer)
場所 System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.UpdatePanel.RenderChildren(HtmlTextWriter writer)
場所 System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)
場所 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output)
場所 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
場所 System.Web.UI.Page.Render(HtmlTextWriter writer)
場所 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint),
