ResponseHtml empty on Failure on Internet Explorer 11

[whitedevils]

This is my code in my MVC C# project. ResponseHtml is always empty on IE11 browser

            try
            {
                    var disposition = new System.Net.Mime.ContentDisposition
                    {
                        FileName = "Test",
                        Inline = false,
                        DispositionType = System.Net.Mime.DispositionTypeNames.Attachment
                    };
                    Response.Headers.Add("Content-Disposition", disposition.ToString());
                    return File(fileContent, "application/pdf");
            }
            catch (Exception ex)
            {
                Response.StatusCode = 500;
                return Content(ex.Message, "text/html");
            }

and this is the javascript

         $.fileDownload($(this).attr('action'), {
                    httpMethod: 'POST',
                    data: $(this).serialize(),
                    failCallback: function (responseHtml, url, error) {
                        debugger                       
                    },
                    successCallback: function (data) {
                        document.cookie = "fileDownload=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;";
                    }
                });