Report Viewer 2010 fall in loop

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C#

C#4.0

Hi everyone,

I have tried to using of report viewer 2010 but when I pass the parameter and run the application it fall in a loop and doesn't show anything, my application was in .net 3.5 but when I convert that to 4.0 this issue happened, I tried to create a new rdlc and use of report viewer 2010 but no result,
this is my cs code :

protected void Page_Load(object sender, EventArgs e)
       {

           object exCarId = HttpContext.Current.Session[Constants.ExCarID];
           if (exCarId != null)
           {
               string select = string.Format("Select * from ExCar where Id = {0} ", exCarId);
               DataRow datarow = xps.GetDataRow(select);
               if (datarow != null)
               {
                   //    string Herasat = File.ReadAllText(Server.MapPath("~/App_Data/Herasat.txt"));
                   //    string ModirKol = File.ReadAllText(Server.MapPath("~/App_Data/ModirKol.txt"));

                   List<reportparameter> list = new List<reportparameter>();


                   list.Add(new ReportParameter("p1", Convert.ToString(datarow["CarNum"])));
                   list.Add(new ReportParameter("p2", Convert.ToString(datarow["CarType"])));
                   list.Add(new ReportParameter("p3", Convert.ToString(datarow["ShasiNum"])));
                   list.Add(new ReportParameter("p4", Convert.ToString(datarow["OwnerType"])));
                   list.Add(new ReportParameter("p5", Convert.ToString(datarow["MotorNum"])));
                   list.Add(new ReportParameter("p6", Convert.ToString(datarow["SerialNum"])));



                   ReportParameter[] reportParameters = list.ToArray();

                   rptViewer.LocalReport.SetParameters(reportParameters);
                   rptViewer.LocalReport.EnableExternalImages = true;
                   //rptViewer.LocalReport.EnableExternalImages = true;
                   rptViewer.LocalReport.Refresh();
                   rptViewer.DataBind();
               }
           }
       }

thanks in advanced!