รบกวนช่วยดู Code combobox นี้ให้ผมหน่อยน่ะครับว่ามันผิดตรงไหน

<select name="feas">
<?php
$strSQL = "SELECT * FROM feas";
$result = mysql_query( $strSQL, $conn );
while ( $rs = mysql_fetch_array( $result ) )
{	
?>
<option value=<?php echo $rs['feas'] ?>><?php echo $rs['feas'] ?></option>
<?php
}
?>
</select>

<select name="feas">
<?
$strSQL = mysql_query("SELECT * FROM feas");

while ( $rs = mysql_fetch_array( $result ) ){	
?>
<option value="<?=$rs['feas'];?>"><?=$rs['feas'];?></option>
<?
}
?>
</select>

<select name="feas">
<?php
//require('conn_mysql.php'); // ไฟล์ติดต่อฐานข้อมูล
$strSQL = "SELECT * FROM feas";
$result = mysql_query($strSQL);
while ( $rs = mysql_fetch_array( $result ) )
{	
?>
<option value=<?php echo $rs['feas'] ?>><?php echo $rs['feas'] ?></option>
<?php
}
?>
</select>

<select name="feas">
<option value="">- กรุณาเลือก Feas -</option>
<?php
$strSQL = "SELECT * FROM feas order by feasid";
$result = mysql_query( $strSQL);
while ( $rs = mysql_fetch_array( $result ) )
{	
echo "<option value=\"$rs[feas]\">$rs[feas]</option>\n";
}
?>
</select>