php formular problem

PHP kode 

 <!-- Minus AutoDato -->
 
 <?php
 include_once('Connect2.php'); 
 
 if(isset($_POST['Submit'])){
 
     
 $EjerID=$_POST['EjerID'];
     $sql ="UPDATE Databasen SET EjerID='$EjerID' WHERE hid='".mysql_real_escape_string($_GET['hid'])."'";
     $rs = mysql_query($sql) or die("Der er sket en fejl. Fejlnr. ".mysql_error());
     $msg ="DINE DATA ER OPDATERET";
 }
 else{
     $sql ="SELECT * FROM Databasen WHERE hid='".mysql_real_escape_string($_GET['hid'])."'";
     $rs = mysql_query($sql) or die("Der er sket en fejl. Fejlnr. ".mysql_error());
     $row = mysql_fetch_array($rs);    
     $EjerID=$row['EjerID'];    
     $msg ="";
 }
 
 
 
 ?>
 
 <?php
 echo $msg."<br>";
 ?>
 
 
 <form action="<?php echo $_SERVER['PHP_SELF']?>?hid=<?php echo $row['hid']?>" method="post">
     <table>
    
    
     <tr>
         <td class="skrift"><font size="2"><b> </b></td>
         <td>
 <input type="hidden" size="10" value="<?php echo $EjerID; ?>" name="EjerID" class="bottom">
         </td>
     </tr>  
 
 
     <tr>
         <td class="skrift">
             <div class="TextAlignRight"></div>
         </td> 
 
         <td >
             <div class="TextAlignRight"><br>
                 <input type="submit" value="opdater" name="Submit" class="bottom">
             </div>
         </td>
     </tr>
     </table>
 </form>
 
 
 <?
 }; // afslutter whileloopet
 ?>