random script driller

Hejsa, jeg har det her script som udfra en db med film i returnere en tilfældig film, men scriptet returnere en tom post engang imellem, og jeg har ikke noget tomme poster i databasen, nogen der ved hvad der sker??
Mvh Krydset
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<?PHP
session_start();
/*
*    +-----------------------------------------------------------------------------+
*        Projekt Name:    Dvd arkiv Vers. 3
*    +-----------------------------------------------------------------------------+
*        Copyright Notes: Copyrights 2003 pc-dk.dk
*    +-----------------------------------------------------------------------------+
*      Disclaimer Notice(s)                                                         
*      DONT USE THIS SCRIPT UNLESS YOU HAVE MY PERMISSIONS ON PARER     
*      WITH MY PERSONAL SIGNATURE ANY QUESTIONS FOR THAT
*      SEND ME A MAIL: TLARSEN@PC-DK.DK                                                                   
*      IF YOU WANT TO USE THIS SCRIPT THEN MAIL ME AND PAY FOR IT
*    +-----------------------------------------------------------------------------+
*        Author(s): Thomas Larsen / Dk-Medieburner E-Mail: Tlarsen@pc-dk.dk
*    +-----------------------------------------------------------------------------+
*/

    #error_reporting(E_ALL); //For debuggin only, prints all error!   
                            //remove the # to debug

/**
*    Module comments (Brief shorly what this piece of code do)
    This script is generate a random movie from the database
*/

    //includes the file there is openings a connection to a database
    include_once("dbconnect.php");

/*
    Here starts the code
*/

//find the numbers of movies there is in the database
$res_antal = mysql_query("SELECT * FROM film") or die(mysql_error());
$antal = mysql_num_rows($res_antal);
//selects a random id from the database between 1 - $antal($antal it the numbers there is in the database)
$number = rand("1", "$antal");

//Make query to find at random movie in the databse
$movie_res = mysql_query("SELECT * FROM film WHERE id = '$number'") or die(mysql_error());





/*
    Here stops the code
    if you have any html
    write it belowe here
*/
?>

<html>
    <head>
        <title></title>
        <link rel="stylesheet" type="text/css" href="../style.css">
    </head>
   
    <body background="">
    <table>
        <?php
        while ($row = mysql_fetch_array($movie_res)) {
            ?>
            <tr>
                <td><?php echo $row['titel']; ?></td>
            </tr>
            <tr>
                <td><?php echo $row['beskrivelse']; ?></td>
            </tr>
            <tr>
                <td><?php echo $row['ejer']; ?></td>
            </tr>
            <tr>
                <td><?php echo $row['aar']; ?></td>
            </tr>
            <tr>
                <td><?php echo $row['lengde']; ?></td>
            </tr>
            <tr>
                <td><?php echo "<a href='read_rest_movie.php?id=$row[id]&titel=$row[titel]'>Læs resten</a>"; ?></td>
            </tr>
            <?php
        }
        ?>
   
    </body>
</html>