Aiuto su PHPExcel

[fermat]

sto crecando di usare questa libreria per esportare il contenuto di una tabella.
ho fatto un semplice esempio:

<?php
if ($_SERVER['REQUEST_METHOD'] == "POST") {
    // [url]http://blog.mayflower.de/archives/561-Import-and-export-data-using-PHPExcel.html[/url]
    include_once 'phpex/PHPExcel.php';
    $objEx = new PHPExcel();
    echo date('H:i:s') . " Creation
";
    $objEx->getProperties()->setCreator("Mattepuffo")
            ->setLastModifiedBy("Mattepuffo")
            ->setTitle("My library")
            ->setSubject("My library")
            ->setDescription("My library in excel.")
            ->setKeywords("Library book excel office php")
            ->setCategory("Book");

    echo date('H:i:s') . " Adding
";
    $objEx->getActiveSheet()->setTitle('Book');
    $objEx->setActiveSheetIndex(0)
            ->setCellValue('A1', 'Hello')
            ->setCellValue('B2', 'world!')
            ->setCellValue('C1', 'Hello')
            ->setCellValue('D2', 'world!');

    echo date('H:i:s') . " Saving
";
    $write = PHPExcel_IOFactory::createWriter($phpExcel, 'Excel2007');
    $write->save("C:\\export.xls");

    echo date('H:i:s') . " Peak memory usage: " . (memory_get_peak_usage(true) / 1024 / 1024) . " MB\r
";

    echo date('H:i:s') . " Done.\r
";
}
?>

in pratica ho tutti i messaggi giusti, però il file nn lo salva.
sapete darmi una mano?

[fermat]

ok modificando così ce l'ho fatta:

                    <?php
                        error_reporting(E_ALL);

                        if ($_SERVER['REQUEST_METHOD'] == "POST") {

                            include 'phpex/PHPExcel.php';
                            include 'phpex/PHPExcel/Writer/Excel5.php';

                            echo date('H:i:s') . " Create new PHPExcel object
";
                            $objPHPExcel = new PHPExcel();

                            echo date('H:i:s') . " Set properties
";
                            $objPHPExcel->getProperties()->setCreator("Matteo");
                            $objPHPExcel->getProperties()->setLastModifiedBy("Matteo");
                            $objPHPExcel->getProperties()->setTitle("My library");
                            $objPHPExcel->getProperties()->setSubject("My library");
                            $objPHPExcel->getProperties()->setDescription("My library.");

                            echo date('H:i:s') . " Add some data
";
                            $objPHPExcel->setActiveSheetIndex(0);
                            $objPHPExcel->getActiveSheet()->SetCellValue('A1', 'Hello');
                            $objPHPExcel->getActiveSheet()->SetCellValue('B2', 'world!');
                            $objPHPExcel->getActiveSheet()->SetCellValue('C1', 'Hello');
                            $objPHPExcel->getActiveSheet()->SetCellValue('D2', 'world!');

                            echo date('H:i:s') . " Rename sheet
";
                            $objPHPExcel->getActiveSheet()->setTitle('Book');

                            echo date('H:i:s') . " Write to Excel2007 format
";
                            $objWriter = new PHPExcel_Writer_Excel5($objPHPExcel);
                            $objWriter->save("C:\\excel.xls");

                            echo date('H:i:s') . " Done writing file.\r
";
                            echo date('H:i:s') . " Peak memory usage: " . (memory_get_peak_usage(true) / 1024 / 1024) . " MB\r
";
                            echo date('H:i:s') . " Done.\r
";
                            header('location:[url]http://62.94.208.157/book/index.php[/url]');
                        }
                    ?>

il problema è che salva il file sul server e nn sul pc che esegue la richiesta.