Crystal report is not display output(plz help me for this problem)

ASSALAM-O-ALIKUM SIR;

i write this store procedure in my query analyzer sql 2000 then after the command give this msg " The command(s) completed successfully." now this is my store procedure n the below.

ALTER procedure [dbo].patientrecord
@patient_regcode int
as
begin

select [clinic patient registartion].[patient reg code],[clinic patient registartion].[patient name],
[clinic patient registartion].address,
[clinic patient registartion].[phone no],[clinic opd info].[pv id],
[clinic doctor].[name],[clinic pv treatments].[treatment id] from [clinic patient registartion],[clinic opd info],[clinic doctor],[clinic pv treatments] where [clinic patient registartion].[patient reg code]=@patient_regcode

end

regards

sumaira

protected void Button_generate_report_Click(object sender, EventArgs e)

  SqlDataAdapter da = new SqlDataAdapter();

   DataTable ds = new DataTable();

   SqlCommand cmd = new SqlCommand();

   cmd.CommandText = "patientrecord"; // This is the Procedure name which we have created

cmd.CommandType = System.Data.CommandType.StoredProcedure;

cmd.Parameters.Add("@patient_regcode",SqlDbType.Int).Value = DropDownList_patient_reg_code.Text;

cmd.Connection = connection.get();

cmd.CommandType = System.Data.CommandType.StoredProcedure;

da.SelectCommand = cmd;

da.Fill(ds);

DisplayReport(CrystalReportViewer1, ds, Server.MapPath("xyz.rpt"))

}

public void DisplayReport(CrystalReportViewer crv , DataSet ds , String reportname)
{
  ReportDocument rptdoc = new ReportDocument();
 
  rptdoc.Load(reportname);
  rptdoc.SetDataSource(ds);
  crv.ReportSource = rptdoc ;
  crv.DataBind();
 
}

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