How to read from SOAP XML with jquery ajax

i have this code and it seems it doesn't bring back anything.

Is this correct?

 $(document).ready(function () {

$("#login_btn").click(function (event) {

        var username = $('.user_name').val();
        var password = $('.password').val();

        var wsUrl = "http://ift.tt/1rbiUDt";

        $.ajax({
            type: "post",
            url: wsUrl,
            contentType: 'text/xml; charset=utf-8',
            dataType: 'xml',
            headers: {
                SOAPAction: 'http://ift.tt/1yht0U4'
            },
            data: '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://ift.tt/ra1lAU" xmlns:xsd="http://ift.tt/tphNwY" xmlns:soap="http://ift.tt/sVJIaE"><soap:Body><pfInvoke xmlns="http://ift.tt/1rbiUDy"><sMethod>imsLogin</sMethod><sParams>usr='+username+'|pwd='+password+'</sParams></pfInvoke></soap:Body></soap:Envelope>',
            success: successFn,
            error: errorFn
        });

    });
});

function successFn(data){
    console.log(data);
}

function errorFn(data){
    console.log(data);
}