Crystal Report can't Show Data

public static void ShowReport(Object objReport)
     {
            Form frmReport = new Form();
            frmReport.WindowState = FormWindowState.Maximized;
            CrystalDecisions.Windows.Forms.CrystalReportViewer crViewer = new CrystalDecisions.Windows.Forms.CrystalReportViewer();
            crViewer.Dock = DockStyle.Fill;
            crViewer.ShowGroupTreeButton = false;
            crViewer.ReportSource = objReport;
            frmReport.Controls.Add(crViewer);
            crViewer.RefreshReport();
            frmReport.Show();
        }
        private void btnPrint_Click(object sender, EventArgs e)
        {
            String strQry = String.Empty;
            DataSet dsReport = new DataSet("dsQuotation");
            sqlQry = "Select * from Quotation WHERE VN_Quotation_ID=" + ddlQuoId.Text + "";
            SqlDataAdapter adp = new SqlDataAdapter(sqlQry, cn);
            adp.Fill(dsReport);
            dsReport.AcceptChanges();
            Quotation_Proces.rptQuotation rptQuo = new Quotation_Proces.rptQuotation();
            rptQuo.SetDataSource(dsReport);
            ShowReport(rptQuo);
            //crystalReportViewer1.ReportSource = rptQuo;
            //crystalReportViewer1.Refresh();
            }