เรื่อง Crystal Report ค่ะ Error parameter missing a value ซึ่งถ้าเปิดใช้ พร้อมพารามิเตอร์ แล้วใส่่ไปโดยตรงเรยได้ค่ะ

protected void Button1_Click(object sender, EventArgs e)
    {
      
        CrystalDecisions.CrystalReports.Engine.ReportDocument rpt = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
        rpt.Load(Server.MapPath("/CrystalReport1.rpt"));
        ConnectionInfo crConnectionInfo = new ConnectionInfo();
        crConnectionInfo.ServerName = WebConfigurationManager.AppSettings["CrystalServer"].ToString();
        crConnectionInfo.DatabaseName = WebConfigurationManager.AppSettings["CrystalDatabase"].ToString();
        crConnectionInfo.UserID = WebConfigurationManager.AppSettings["CrystalUser"].ToString();
        crConnectionInfo.Password = WebConfigurationManager.AppSettings["CrystalPassword"].ToString();

        int ses = 0;
        
        if (Request.QueryString["JobID"] != null && Request.QueryString["JobID"] != "")
        {
            ses = Convert.ToInt16(Request.QueryString["JobID"]);
        }
        else
        {
            ses = 0;
        }
        CrystalReportSource1.ReportDocument.SetParameterValue(ses, "MyParameter");
       
       
        String pat = BasePage.PathFileUpload + BasePage.Upload_Folder_SmallImage + "\\";
        CrystalReportSource1.ReportDocument.SetParameterValue(pat, "MyParameter1");
        
    
        CrystalReportViewer1.ReportSource = rpt;
        CrystalReportViewer1.DataBind();
     
        CrystalReportViewer1.PrintMode = CrystalDecisions.Web.PrintMode.ActiveX;
     
    }