Consume XML - message undefined

I'm trying to consume XML Web Service but I'm getting result.Message undefined in success function. Whats wrong in this code? The error is:

Uncaught TypeError: Cannot read property 'Message' of undefined

Here is my code:

function RequestService() {
    $.ajax({
        type: "GET",
        url: "http://ift.tt/1C2MsY9",
        data: "",
        dataType: "xml",
        success: function(data) { SucessCallback(data.d); },
        error: function(data) { FailureCallBack(data); }
    });
}

function SucessCallback(result) {
    $('p').html('Resultado: ' + result.Message + ' <br /> Descrição: ' + result.Description);
}

function FailureCallBack(result) {
    alert("erro");
}