Question OnGuard components error

procedure TrcgMain.spdReleaseCodeClick(Sender: TObject);
var
  Modifier : longint;
  SerialNum : longint;
  Expires : TDateTime;
  ReleaseCode : TCode;
  CodeString : string;
begin
  edtReleaseCode.Text := '';

  // Get the key that will be used to generate the ReleaseCode
  fKey := ApplicationKey;
  if chkMachMod.Checked then
    try
      Modifier := StrToInt(edtMachineMod.Text);       <<============ Enable
      ApplyModifierToKeyPrim(Modifier, fKey, sizeof(fKey));       <<=== Enable
 //      fKey:=MachineKey;                                        <<============ Disable
    except
      MessageDlg('Invalid Machine Modifier.  Please check your entry and try again.', mtError, [mbOK], 0);
      exit;
    end;

  // Get the expiration date
  if chkExpires.Checked then
    try
      Expires := StrToDate(edtExpires.Text);
    except
      MessageDlg('Invalid Expiration Date.  Please check your entry and try again.', mtError, [mbOK], 0);
      exit;
    end
  else
    Expires := 0;

  // Get the serial number
  try
    SerialNum := StrToInt(edtSerialNumber.Text);
  except
    MessageDlg('Invalid Serial Number.  Please check your entry and try again.', mtError, [mbOK], 0);
    exit;
  end;

  // Create the release code for the data givien
  InitSerialNumberCode(fKey, SerialNum, Expires, ReleaseCode);
  CodeString := BufferToHex(ReleaseCode, sizeof(ReleaseCode));

  // Insert spaces in the release code string for easier reading
  System.Insert(' ', CodeString, 17);          <<===================== Add
  System.Insert(' ', CodeString, 13);
  System.Insert(' ', CodeString, 09);
  System.Insert(' ', CodeString, 05);
  edtReleaseCode.Text := CodeString;
end;