The <? echo $rows['']; ?></td> doesnt show up.  its blank...

<?php
$host="localhost"; // Host naam.
$naam="root"; // Mysql login naam.
$wachtwoord=""; // Mysql wachtwoord.
$db_naam="marketplace"; // Database naam.
$tbl_naam="stageplek"; // Table naam.

// Verbinding maken met de server en de database selecteren.
mysql_connect("$host", "$naam", "$wachtwoord")or die("cannot connect");
mysql_select_db("$db_naam")or die("cannot select DB");

// get value of id that sent from address bar
$id=$_GET['id'];

$sql="SELECT * FROM $tbl_naam WHERE id='$id'";
$result=mysql_query($sql);

$rows=mysql_fetch_array($result);
?>
<table width="400" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td><table width="100%" border="0" cellpadding="3" cellspacing="1" bordercolor="1" bgcolor="#FFFFFF">
<tr>
<td bgcolor="#F8F7F1"><strong><? echo $rows['titel']; ?></strong></td>
</tr>

<tr>
<td bgcolor="#F8F7F1"><? echo $rows['omschrijving']; ?></td>
</tr>

<tr>
<td bgcolor="#F8F7F1"><strong>By :</strong> <? echo $rows['opleiding']; ?></td>
</tr>

<tr>
<td bgcolor="#F8F7F1"><strong>Email : </strong><? echo $rows['benodigde_blokken'];?></td>
</tr>

<tr>
<td bgcolor="#F8F7F1"><strong>Date/time : </strong><? echo $rows['datetime']; ?></td>
</tr>
</table></td>
</tr>
</table>
<BR>