frmMain.cs:
private void btnMasterCopy_Click(object sender, System.EventArgs e)
          {
               PrintReport( enmCopyType.Master );

          }

private void PrintReport(enmCopyType copyType)
          {
          int poId;
          string poNum;
          poNum = txtPONumber.Text.Trim().ToString();
          DataSet ds = GetPOID(poNum);
          int x = ds.Tables[0].Rows.Count;
          poId = Convert.ToInt32(ds.Tables[0].Rows[0]["POID"].ToString());
          string RoleID = clsResources.DefaultRoleID;
          Session["poId"]=poId;
          Session["poNum"]=poNum;
          Session["copyType"]=copyType;
          Session["RoleID"]=RoleID;
          Response.Redirect("frmReport.aspx");
          }
     }


frmReport.cs::

private void Page_Load(object sender, System.EventArgs e)
          {
               long poId = Convert.ToInt64(Session["poId"]);
               string poNum = Session["poNum"].ToString();
               enmCopyType copyType = (enmCopyType)Session["copyType"];
               string RoleID = Session["RoleID"].ToString();

               docReport( poId, copyType, "PO #" + poNum,RoleID);
          }

public void docReport(long plngPOID, enmCopyType pType, string poNumber,string RoleID)
          {

                    ReportDocument rpt = new ReportDocument();
                    rpt.Load(Server.MapPath("PO.rpt"));
                    string userName = "sa";
                    string password = "system";
                    string databaseName = "POS_DEV1";
                    string serverName = "99LADA1";
                    ParameterFields allFields = new ParameterFields ();
                    ParameterField poIDfield = new ParameterField ();
                    ParameterDiscreteValue poIDfieldValue = new ParameterDiscreteValue();
                    ParameterField copyTypeField = new ParameterField ();
                    ParameterDiscreteValue copyTypeValue = new ParameterDiscreteValue();
                    ParameterField roleIdField = new ParameterField ();
                    ParameterDiscreteValue roleIdValue = new ParameterDiscreteValue();

                    poIDfield.ParameterFieldName = "POID";
                    poIDfieldValue.Value = plngPOID;
                    poIDfield.CurrentValues.Add( poIDfieldValue );
                    allFields.Add( poIDfield );

                    copyTypeField.ParameterFieldName = "CopyType";
                    copyTypeValue.Value = (int) pType;
                    copyTypeField.CurrentValues.Add( copyTypeValue );
                    allFields.Add( copyTypeField );

                    roleIdField.ParameterFieldName = "RoleId";
                    roleIdValue.Value = RoleID;
                    roleIdField.CurrentValues.Add( roleIdValue );
                    allFields.Add( roleIdField );

                    CrystalReportViewer CrystalReportWebFormViewer2 = new CrystalReportViewer();
                    CrystalReportWebFormViewer2.ParameterFieldInfo = allFields;
                    rpt.SetDatabaseLogon(userName, password, serverName, databaseName);

                    CrystalReportWebFormViewer2.ReportSource = rpt;
                    CrystalReportWebFormViewer2.DataBind();
                    CrystalReportWebFormViewer2.Visible = true;
               }

These are my 2 classes.When debugging i am not getting any Exception.But Data was not loading or displayed in CrystalReportViewer.