Forum PHP.pl

Witam mam taki problem.
Mam ten kod na stronie:

[PHP] pobierz, plaintext 
<?php
$file = 'test.doc';
 
    if (! is_file($file))
    {
        header('HTTP/1.1 404 File Not Found');
        die();
    }
 
    $fname = basename($file);
    $fsize = filesize($file);
    $ftime = filemtime($file);
    $range = $_SERVER['HTTP_RANGE'];
 
    $r_start = 0;
    $c_length = $fsize;
 
    if ($range)
    {
        $reg = "/bytes=([0-9]+)-([0-9]*)/";
        preg_match($reg, $range, $matches);
 
        $r_start = (int) $matches[1];
        $r_stop = (int) $matches[2];
        if ($r_stop < $r_start) $r_stop = $fsize - 1;
        $c_length = $r_stop - $r_start + 1;
 
        header('HTTP/1.1 206 Partial Content');
        header('Content-Range: bytes ' .
            $r_start . '-' . $r_stop . '/' . $fsize);
    }
    else
    {
        header('HTTP/1.1 200 OK');
    }
 
    header('Last-Modified: ' .
        gmdate('D, d M Y H:i:s', $ftime) . ' GMT');
    header('Content-Disposition: ' .
        'attachment; filename="' . $fname . '"');
    header('Accept-Ranges: bytes');
    header('Content-Type: application/x-unknown');
    header('Content-Transfer-Encoding: binary');
    header('Content-Length: ' . $c_length);
 
    if ($fp = fopen($file, 'rb'))
    {
        flock($fp, 1);
        fseek($fp, $r_start);
        echo(fread($fp, $c_length));
        flock($fp, 3);
        fclose($fp);
    }
?>
[PHP] pobierz, plaintext 

Lecz zamiast mi go pobierać to on się wyświetla (chyba bo jakies znaczki (IMG:http://forum.php.pl/style_emoticons/default/tongue.gif) ) + błędy typu:
Warning: Cannot modify header information - headers already sent by...
Co zrobić, aby mi ten plik pobierało (IMG:http://forum.php.pl/style_emoticons/default/questionmark.gif)