Error AJAX Request - Success does not work

Question

Good afternoon, you guys,

I have the following AJAX request:

$(document).ready(function () {
  $.ajax({
           url: "/membros.aspx/populaGridMembros",
           type: "POST",
           dataType: "json",
           contentType: "application/json; charset=utf-8",
           success: function (result) {
             populaTabela(result);
           },
           error: function() {
             alert("Ocorreu um erro ao carregar os dados.");
           }
        });
    });

The populaTable method takes the result of the populaGridMembers function and inserts it into a table on the page.

The problem is that when I run this code on the page, there is no error in the AJAX request, but it does not enter the Success parameter. In the firefox debugging I discovered that after it ran all this javascript code, ie during the debug step by all parameters of the $.ajax function(url, type, dataType, contenttype, Success and error the $.ajax function returns the values returned by the populated functionGridMembers of the url and displays a window with the following information:

Can someone help me? Thanks in advance!!!

Follows the code of the populaTable function:

function populaTabela(response) {
    var data = JSON.parse(response);
    for (var j in data) {
        out += "<tr><td>" + data[j].NOME + "</td><td>" +
                "</td><td>" + data[j].SOBRENOME + "</td><td>" +
                "</td><td>" + data[j].RG + "</td><td>" +
                "</td><td>" + data[j].CPF + "</td><td></tr>";
        j++;
    }
}