Drop-Down List Not Working

Hi,

I have the following code:

<tr>
<td align="right" valign="top" width="50%">1) Select a County Here</td>
<td valign="top"><select name="cbocounty">
<option value="0">All Counties</option>
[allowphp]
$countysql="SELECT * FROM tblcounties order by countyname";
$mydata = mysql_query($countysql) or die(mysql_error());

while ($myrow = mysql_fetch_array($mydata)){
$countyid = $myrow['countyid'];
$countyname = $myrow['countyname'];
echo '<option value='.$countyid.'>';
echo $countyname;
echo '</option>';
}
[/allowphp]
</select>
</td>
</tr>

It should show a drop-down list with county names, but the following HTML results instead:

<tr>
<td align="right" valign="top" width="50%">1) Select a County Here</td>
<td valign="top">
<select name="cbocounty">
<option value="0">All Counties</option>
<p>
Kiambu

Machakos

Mombasa

Nairobi
<br />

</select>
</td>
</tr>

Please advise.

http://wordpress.org/extend/plugins/allow-php-in-posts-and-pages/