PHPExcel Chart не будет работать при прямой загрузке

Вот мой код … он идентичен коду примера … за исключением конца, где я изменил его для загрузки непосредственно из браузера вместо создания файла на сервере.

Когда я загружаю Excel, это все, что я вижу (без диаграммы):

<?php

/** Error reporting */
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
date_default_timezone_set('Europe/London');

define('EOL',(PHP_SAPI == 'cli') ? PHP_EOL : '<br />');

date_default_timezone_set('Europe/London');

/**
* PHPExcel
*
* Copyright (C) 2006 - 2014 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*
* @category   PHPExcel
* @package    PHPExcel
* @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
* @version    1.8.0, 2014-03-02
*/

/** PHPExcel */
require_once 'Classes/PHPExcel.php';$objPHPExcel = new PHPExcel();
$objWorksheet = $objPHPExcel->getActiveSheet();
$objWorksheet->fromArray(
array(
array('',   2010,   2011,   2012),
array('Q1',   12,   15,     21),
array('Q2',   56,   73,     86),
array('Q3',   52,   61,     69),
array('Q4',   30,   32,     0),
)
);

//  Set the Labels for each data series we want to plot
//      Datatype
//      Cell reference for data
//      Format Code
//      Number of datapoints in series
//      Data values
//      Data Marker
$dataseriesLabels = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$B$1', NULL, 1),   //  2010
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$C$1', NULL, 1),   //  2011
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$D$1', NULL, 1),   //  2012
);
//  Set the X-Axis Labels
//      Datatype
//      Cell reference for data
//      Format Code
//      Number of datapoints in series
//      Data values
//      Data Marker
$xAxisTickValues = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$A$2:$A$5', NULL, 4),  //  Q1 to Q4
);
//  Set the Data values for each data series we want to plot
//      Datatype
//      Cell reference for data
//      Format Code
//      Number of datapoints in series
//      Data values
//      Data Marker
$dataSeriesValues = array(
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$B$2:$B$5', NULL, 4),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$C$2:$C$5', NULL, 4),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$D$2:$D$5', NULL, 4),
);

//  Build the dataseries
$series = new PHPExcel_Chart_DataSeries(
PHPExcel_Chart_DataSeries::TYPE_BARCHART,       // plotType
PHPExcel_Chart_DataSeries::GROUPING_CLUSTERED,  // plotGrouping
range(0, count($dataSeriesValues)-1),           // plotOrder
$dataseriesLabels,                              // plotLabel
$xAxisTickValues,                               // plotCategory
$dataSeriesValues                               // plotValues
);
//  Set additional dataseries parameters
//      Make it a horizontal bar rather than a vertical column graph
$series->setPlotDirection(PHPExcel_Chart_DataSeries::DIRECTION_BAR);

//  Set the series in the plot area
$plotarea = new PHPExcel_Chart_PlotArea(NULL, array($series));
//  Set the chart legend
$legend = new PHPExcel_Chart_Legend(PHPExcel_Chart_Legend::POSITION_RIGHT, NULL, false);

$title = new PHPExcel_Chart_Title('Test Bar Chart');
$yAxisLabel = new PHPExcel_Chart_Title('Value ($k)');//  Create the chart
$chart = new PHPExcel_Chart(
'chart1',       // name
$title,         // title
$legend,        // legend
$plotarea,      // plotArea
true,           // plotVisibleOnly
0,              // displayBlanksAs
NULL,           // xAxisLabel
$yAxisLabel     // yAxisLabel
);

//  Set the position where the chart should appear in the worksheet
$chart->setTopLeftPosition('A7');
$chart->setBottomRightPosition('H20');

//  Add the chart to the worksheet
$objWorksheet->addChart($chart);// Redirect output to a client’s web browser (Excel2007)
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="SurveyReport.xlsx"');
header('Cache-Control: max-age=0');

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->save('php://output');

Я что-то пропустил?