Почему после формирования файл не скачивается?

<?php
 $link = mysql_connect('localhost', 'user4215_pov', 'rd25TEXN%;=s')
    or die('Не удалось соединиться: ' . mysql_error());
mysql_query("SET NAMES utf8");
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET character_set_client = utf8");
mysql_query("SET character_set_connection = utf8");
mysql_query("SET character_set_results = utf8");
mysql_select_db('user4215_pov') or die('Не удалось выбрать базу данных');
 
require_once 'PHPExcel.php';
$phpexcel = new PHPExcel();
 
 
 
$page = $phpexcel->setActiveSheetIndex(0);
$page->getColumnDimension('A')->setWidth(25);
$page->getColumnDimension('B')->setWidth(25);
$page->getColumnDimension('C')->setWidth(35);
$page->getColumnDimension('D')->setWidth(25);
$page->getColumnDimension('E')->setWidth(25);
$page->getColumnDimension('F')->setWidth(25);
$page->setCellValue("A1", "ID ЗАКАЗА");
$page->setCellValue("B1", "ДАТА");
$page->setCellValue("C1", "ГОТОВНОСТЬ");
$page->setCellValue("D1", "ТОВАРЫ");
$page->setCellValue("E1", "ВЫРУЧКА");
$page->setCellValue("F1", "СТАТУС ОПЛАТЫ");
 
                            
 
    $sqlu = "SELECT mo.id as idz, mo.date as dataz, mo.status as statusz, mo.gotov as gotovz, mo.price as pricez FROM modx_shopkeeper3_orders as mo WHERE DATE_FORMAT(mo.date,'%Y-%m-%d') between '".$_POST['date_minn']."' and '".$_POST['date_maxx']."' ";
            $resultrating = mysql_query($sqlu);
            $sumall = 0;
            $summa_all_count_z = 0;
            $i = 3;
while ($parent_nameu = mysql_fetch_assoc($resultrating)) {
$page->setCellValue("A".$i, $parent_nameu['idz']);
$page->setCellValue("B".$i, $parent_nameu['dataz']);
switch ($parent_nameu['gotovz']) {
    case 0:
        $page->setCellValue("C".$i, "Не готов");
        break;
    case 1:
        $page->setCellValue("C".$i, "Готов");
        break;
}
 
$sqlsp = "SELECT sum(mp.count) as sump, mp.name as namep, mp.price as pricep , mo.userid as userz, mu.username FROM modx_shopkeeper3_purchases as mp, modx_shopkeeper3_orders as mo, modx_users as mu where DATE_FORMAT(mo.date,'%Y-%m-%d') between '".$_POST['date_min']."' and '".$_POST['date_max']."' and mo.id=".$parent_nameu['idz']." and mp.order_id=mo.id AND mu.id=mo.userid   GROUP BY mp.name ORDER BY sum(mp.count) DESC";
$resultsp = mysql_query($sqlsp);
$summa_count = 0;
while ($parent_nameuu = mysql_fetch_assoc($resultsp)) { 
   $summa_count = $summa_count + $parent_nameuu['sump'];
   $summa_all_count_z = $summa_all_count_z + $parent_nameuu['sump'];
}
 
$page->setCellValue("D".$i, $summa_count);
 
$sqlsp = "SELECT sum(mp.count) as sump, mp.name as namep, mp.price as pricep , mo.userid as userz, mu.username FROM modx_shopkeeper3_purchases as mp, modx_shopkeeper3_orders as mo, modx_users as mu where DATE_FORMAT(mo.date,'%Y-%m-%d') between '".$_POST['date_minn']."' and '".$_POST['date_maxx']."' and mo.id=".$parent_nameu['idz']." and mp.order_id=mo.id AND mu.id=mo.userid   GROUP BY mp.name ORDER BY sum(mp.count) DESC";
$resultsp = mysql_query($sqlsp);
$summaz = 0;
$j = $i + 1;
while ($parent_nameuu = mysql_fetch_assoc($resultsp)) { 
    $summaz = $summaz + ($parent_nameuu['sump'] * $parent_nameuu['pricep']);
    $sumall = $sumall + ($parent_nameuu['sump'] * $parent_nameuu['pricep']);
    $page->setCellValue("D".$j, $parent_nameuu['namep']."  x".$parent_nameuu['sump']." - ".$parent_nameuu['pricep']."P");
 
    $j = $j+1;
}
 
$page->setCellValue("E".$i, $summaz);
switch ($parent_nameu['statusz']) {
                                        case 1:
                                            $page->setCellValue("F".$i, "Новый");
                                            break;
                                        case 6:
                                            $page->setCellValue("F".$i, "Оплачен");
                                            break;
                                        case 7:
                                            $page->setCellValue("F".$i, "Не оплачен");
                                            break;
                                    }
            $i = $j+1;
            }   
 
$i = $i+5;  
$page->setCellValue("C".$i, "5% от оборота составило:".$sumall*0.05);
$page->setCellValue("D".$i, $summa_all_count_z);
$page->setCellValue("E".$i, $sumall);       
            
$page->setTitle("ОТЧЕТ ЗА");
 
 
header ( "Expires: Mon, 1 Apr 1974 05:00:00 GMT" );
 header ( "Last-Modified: " . gmdate("D,d M YH:i:s") . " GMT" );
 header ( "Cache-Control: no-cache, must-revalidate" );
 header ( "Pragma: no-cache" );
 header ( "Content-type: application/vnd.ms-excel" );
 header ( "Content-Disposition: attachment; filename=matrix.xlsx" );
 
// Выводим содержимое файла
 $objWriter = new PHPExcel_Writer_Excel5($phpexcel);
 $objWriter->save('php://output');