Не работает preloader

var itemSource = []; 
var k = 0; 
var source; 
   $().SPServices({ 
        operation: "GetListItems", 
        async: false, 
        listName: "User", 
        CAMLViewFields: "<ViewFields><FieldRef Name='FirstName' /></ViewFields>", 
        CAMLQuery: '', 
         completefunc: function (xData, Status) { 
            $(xData.responseXML).SPFilterNode("z:row").each(function () { 
               itemSource[k] = $(this).attr('ows_FirstName'); 
                k = k + 1; 
                itemSource = $.grep(itemSource,function(n){ return n == 0 || n  }); 
                var uniqueNames = []; 
                $.each(itemSource, function(i, el){ 
                if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el); 
            }); 
            uniqueNames.sort();            
$('#Name').autocomplete({ 
        source: uniqueNames, 
        appendTo: "#results", 
        open: function() { 
        var position = $("#results").position(), 
            left = position.left, top = position.top; 
            $("#results > ul").css({left: (left + 20) + "px", top: (top + 10) + "px" }); }, 
        select: function (event, ui) { 
        var test = $("#Name").val(ui.item.label); 
        $("#Name").val(''); 
        }, 
        change : function () { 
        $('#Name').val($(this).val()); 
                }, 
            }); 
        });   
     } 
  });