SQL Error (Opgelost)

                <tr>
                    <td>Antwoord:</td>
                    <td><textarea name=messages cols=40 rows=8><?=$messsage; ?></textarea></td>
                </tr>

<tr>
                    <td>Antwoord:</td>
                    <td><textarea name=messages cols=40 rows=8><?=$messsage; ?></textarea></td>
                </tr>

                        $sql2 = mysql_query("SELECT * FROM helpdesk WHERE id = '$id'");
        			$tick = mysql_fetch_array($sql2);
                        $messsage = "Beste  ".$tick['username']."<br><br><b>Uw vraag was:</b> <br>".$tick['message']."<br><br><b>Iemand van de staff heeft het volgende antwoord gegeven:</b><br><br>".$_POST['messages']."<br><br>We hopen dat we u hebben geholpen met uw vraag.<br><b>De staff.";
                        $date = date("H:i:s d-m-Y");
                        $message = mysql_real_escape_string($message);
			mysql_query("INSERT INTO `[messages]` (`time`, `IP`, `from`, `to`, `subject`, `message`) VALUES (NOW(),'{$_SERVER['REMOTE_ADDR']}','Helpdesk','$tick[username]','Helpdesk','$messsage')") or die(mysql_error());
                        mysql_query("UPDATE helpdesk SET closed = '$username' WHERE id = '$id'");
                        echo "<font color=#FFFFFF>Het bericht is verzonden.<meta http-equiv=Refresh content=0;url=hd.php?page=view>";

$sql2 = mysql_query("SELECT * FROM helpdesk WHERE id = '$id'");
        			$tick = mysql_fetch_array($sql2);
                        $messsage = "Beste  ".$tick['username']."<br><br><b>Uw vraag was:</b> <br>".$tick['message']."<br><br><b>Iemand van de staff heeft het volgende antwoord gegeven:</b><br><br>".$_POST['messages']."<br><br>We hopen dat we u hebben geholpen met uw vraag.<br><b>De staff.";
                        $date = date("H:i:s d-m-Y");
                        $message = mysql_real_escape_string($message);
			mysql_query("INSERT INTO `[messages]` (`time`, `IP`, `from`, `to`, `subject`, `message`) VALUES (NOW(),'{$_SERVER['REMOTE_ADDR']}','Helpdesk','$tick[username]','Helpdesk','$messsage')") OR die(mysql_error());
                        mysql_query("UPDATE helpdesk SET closed = '$username' WHERE id = '$id'");
                        echo "<font color=#FFFFFF>Het bericht is verzonden.<meta http-equiv=Refresh content=0;url=hd.php?page=view>";

function prep_char($string){
$string=addslashes($string);
$string=htmlentities($string);
return $string;
}

function prep_char($string){
$string=addslashes($string);
$string=htmlentities($string);
return $string;
}

$titel=prep_char($_POST{'titel']);

$titel=prep_char($_POST{'titel']);