Billede til Mysql problemer

Hej.

Jeg har et lille problem med et "billede upload til mysql script"

den vil ikke uploade hele billedet.

Kode:
<?php
session_start();
$root = $_SERVER['DOCUMENT_ROOT'];
require("$root/top.php");
?>
<?php
if (isset($_POST["ok"])) {
    $file_code = addslashes(fread(fopen($form_data, "r"), filesize($form_data)));
require("../conn.php");
$ses = $_SESSION["navn"];
mysql_query("insert into files (file_code, file_size, file_type, navn) values ('$file_code', $form_data_size, '$form_data_type', '$ses')") or die(mysql_error());
echo "<p>Billedet er uploadet!</p>";

session_destroy();
}
?>
<form action="" method="post" enctype="multipart/form-data">
<p>
Evt. billede:<br><input name="form_data" type="file" id="upload"><br><br>
<input type="hidden" name="MAX_FILE_SIZE" value="1000000"><br>
<input type="submit" value="Upload" id="submit" name="ok">
</p>
</form>

<?php
$root = $_SERVER['DOCUMENT_ROOT'];
require("$root/bund.php");
?>

//Mathias