Datatables jQuery Select

I have a problem with the selects in jQuery DataTables. The first page loads the selections well but the second does not. Sometimes it loads them, others not

$.ajax({
  type: "POST",
  url: "Compensaciones.aspx/getTipoConceptoComp",
  data: "{p_IdTipoTributo: '" + $("#<%=ddlTipoTributo.ClientID %>").val() + "'}",
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function(data, st) {
    if (st == 'success') {
      if (data.d.length > 0) {
        dropdownlist = $('#Detalledet select').empty().append('<option selected="selected" value="0">SELECCIONE</option>')[i];
        $.each(data.d, function() {
          dropdownlist = $('#Detalledet select').append($("<option value=" + this['IDTIPOCONCEPTO'] + "></option>").val(this['IDTIPOCONCEPTO']).html( /*this['CONCEPTO'] + " - " + */ this['DESCRIPCION'] + "  " + this['IMPACTO']))[i];
        });
      } else {
        dropdownlist = $('#Detalledet select').empty().append('<option selected="selected" value="0">Not available<option>')[i];
      }
    }
  },
  failure: function(data) {
    alert(data.d);
  }
});

I was able to solve it by calling the function in the drawcallback of the table thanks to all who took the trouble to answer