[jQuery] ajaxSuccess function is not run

[jQuery] ajaxSuccess function is not run

I use jquery.form plugin to submit a form , but the ajaxSuccess()
function not run, other function run exacitly , how can i let jquery
knows it run success
Codes:
function submitImageUploadForm(){
        // 显示 loading 图片
        $("#loading")
        .ajaxStart(function(){
            $(this).show();
        })
        .ajaxComplete(function(){
            $(this).hide();
        });
        // 即时消息提示
        $('#upload_error')
        .ajaxStart(function(){
                $(this).text("请稍等,照片正在上传中...");
            })
        .ajaxComplete(function(){
                $(this).text("上传完毕...");
            })
.ajaxSuccess(function(){
                $(this).text('上传成功,进行下一步');
            });
        var options ={
            // URL 在 form 表单中定义,这里定义不妥
            dataType: 'json',
            resetForm: true,
         //success: function(data) {
             // 成功后去掉上传框中内容,避免重复上传,同时去掉提示
            //    $('#fileupload').val('');
                // 成功后让按钮不能点击,以进行下一步
            //    $('#upload_error').text('上传成功,进行下一步');
         // json data
     //    alert("fffffffff");
            //}
        };
        $('#uploadform').ajaxSubmit(options);
}