Report Re-opening Problem

Hi,

I have created a RDL report and successfully deployed it in reporting server. The following code is used to open the Report.

private void Form1_Load(object sender, EventArgs e){
this.reportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Remote;


this.reportViewer1.ServerReport.ReportServerUrl = new Uri("http://localhost/ReportServer");
this.reportViewer1.ServerReport.ReportPath = "/Import Run Reports/ImportRunReport";
Microsoft.Reporting.WinForms.ReportParameter[] param = new Microsoft.Reporting.WinForms.ReportParameter[2];param[0] = new Microsoft.Reporting.WinForms.ReportParameter("RunId", "195900,195904,195711,195707");param[1] = new Microsoft.Reporting.WinForms.ReportParameter("ReportType", "Summary");
reportViewer1.ServerReport.SetParameters(param);
reportViewer1.RefreshReport();
}
Very first time the Report is opening successfully. Once I close the window and again i am trying to open the report i am getting the following error "The underlying connection was closed: A connection that was expected to be kept alive was closed by the server."
Could you Please help me in this regard.