unknown file size..php download script error

[lajeeshk]

i use the below code for testing download from my site.all are working fine and file gets download.but have an error that when downloading the download manager shows unknown file size and unknow time remaining.how can i remove this error..pls help me..the code i used is given below

 

 

 

<?php

$file ="pic.jpg";

 

if ($fd = fopen ($file, "rb"))

{ 

    $fsize = filesize($file);

    header('Content-Description: File Transfer');

    header('Content-Type:image/jpeg');

    header('Content-Disposition: attachment; filename=.basename($file));

    header('Content-length: '.filesize($file));

    header('Content-Transfer-Encoding: binary');

    header('Expires: 0');

    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');

    header('Pragma: public');

    ob_clean();

    flush();

  sleep(1);

  fpassthru($fd);

}

?>

[leehanken]

I don't know if it has to be 'Content-Length' rather than 'Content-length'?