ReportViewer - Failed to export data

I use ReportViewer control (ReportViewer version: 2010 SP1) with LocalReport option (using .rdlc files) to display reports in my project. When export data in ReportViewer control to Excel file, I got the "The remote host closed the connection. The error code is 0x800704CD" error message. The data contained in the ReportViewer control is quite large - more than 25.000 records, each record has 23 columns.

The duration from the time I clicked on the Excel export link to the time I got the IE error page is 10 minutes. I repeated the test multiple times and the results are the same. So I suspected this might be caused by a timeout configuration of the web application. Thus, I set the httpRuntime/executionTimeout (obviously I set the debug mode of the web to false), session timeout, and form authentication cookie timeout to 1 hour, but the result is the same (got the error page after 10 minutes).

Do you know what caused this issue? Could you please help?

Below is the details of the error I got.

Exception information:

Exception type: HttpException
Exception message: The remote host closed the connection. The error code is 0x800704CD.
at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError(Int32 result, Boolean throwOnDisconnect)
at System.Web.Hosting.IIS7WorkerRequest.ExplicitFlush()
at System.Web.HttpResponse.Flush(Boolean finalFlush)
at System.Web.HttpWriter.WriteFromStream(Byte[] data, Int32 offset, Int32 size)
at Microsoft.Reporting.WebForms.ReportDataOperation.StreamToResponse(Stream data, HttpResponse response)
at Microsoft.Reporting.WebForms.ExportOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response)
at Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Request information:

Request URL: http://example.com/Reserved.ReportViewerWebControl.axd?Culture=2057&CultureOverrides=True&UICulture=2057&UICultureOverrides=True&ReportStack=1&ControlID=44d295a585a8483984f0f7606a3d7fa5&Mode=true&OpType=Export&FileName=Invoice_&_Order_List_Report_20130801032657&ContentDisposition=OnlyHtmlInline&Format=Excel
Request path: /app_virtual_dir/Reserved.ReportViewerWebControl.axd
User host address: xxx
User: xxx
Is authenticated: True
Authentication Type: Forms
Thread account name: IIS APPPOOL\xxx