word document is not correct after downloaded

[h3ctor83]

hello everyone.. can anybody help me?
i made an application to upload files to the server..
and after that use ris able to download that file again..
but after downloading the file (specifically word document), i found that the content is not correct..

lets say the original content is "This is a word document"..afte r downloading the file..the content becomes "&@%&*@**)@!)(! @)((___@!#" (some invalid unreadable characters)..
what cause this error? i also cannot view a jpeg document after downloading it..

here's the script for my download.php :

<?
ob_start();
session_start() ;

include 'config.php';
include 'opendb.php';

$query = "SELECT * FROM phpgw_dts_attac hment WHERE att_id = ".$_REQUEST['att_id'];
$result = mysql_query($qu ery, $db);

if ($result){
while($row = mysql_fetch_arr ay($result))
{
$att_name = $row['att_name'];
$att_path = $row['att_path'];
$location = $att_path.$row['att_tempname'];
$att_type = $row['att_type'];
}
}
header('Content-Disposition: attachment; filename="'.$at t_name.'"');
header("Cache-Control: must-revalidate");
header("Content-Type: ".$att_type );
readfile($locat ion);

//ini_set('zlib.o utput_compressi on','Off');

exit();
?>

can anyone help me with this?

[mihai123]

hmmm

if you try to view in browser the word it's normal to see that caracter
download the file and open it with microsoft word.
header("Content-Type: application/octet-stream");

Note: i see that you user a blob to store the file. Maybe the blob it's to small i notice from my experience that a program manager for database can create only blob with small storage capability. It's useful to manually create the blob colum by using a php script.