สร้างกราฟแสดงยอดขาย แล้วขึ้น error แบบนี้ค่ะ Unknown column 'orders.UpdateDate' in 'where clause'

<?php
    include("config.php");
	$month = $_GET["month"]==""?1:$_GET["month"];
	$year = $_GET["year"]==""?2011:$_GET["year"];
	$sqlMoney="select money,type.type_name from(select product.type_id,type.type_name,SUM(orderdetail.number*orderdetail.price) AS money from orders INNER JOIN orderdetail ON (orders.id_order=orderdetail.id_order)";
	$sqlMoney .= " INNER JOIN product ON (product.id_pro=orderdetail.id_pro) ";
	$sqlMoney .= " INNER JOIN type ON (product.type_id=type.type_id) ";
	$sqlMoney .= " WHERE DATE_FORMAT(orders.UpdateDate,'%Y-%m')='".date("Y-m", mktime(0, 0, 0, $month, 1, $year))."' ";
	$sqlMoney .= " Group by product.type_id,type.type_name) AS tb_money ";
	$sqlMoney .= " RIGHT JOIN type ON (tb_money.type_id=type.type_id)";
	$queryMoney = mysql_query($sqlMoney) or die (mysql_error());
	$numMoney = mysql_num_rows($queryMoney);
?>
<chart palette="2" caption="รายงานยอดการขายโดยรวม" 
subcaption="ประจำเดือน <?=date("F", mktime(0, 0, 0, $month, 1, 2011))?> ประจำปี <?=$year?>" xAxisName="กลุ่มสินค้า" yAxisName="Moneys" showValues="0" decimals="0" numberSuffix=" บาท" formatNumberScale="0">
<?php
    while($resultMoney = mysql_fetch_array($queryMoney))
	{
?>
        <set label="<?=$resultMoney["type_name"]?>" value="<?=$resultMoney["money"]==null||$resultMoney["money"]==""?0:$resultMoney["money"]?>" />
<?php
	}
?>
<styles>
        <definition>
            <style name="myAnim" type="animation" param="_yScale" start="0" duration="1"/> 
        </definition>
        <application>
            <apply toObject="VLINES" styles="myAnim" /> 
        </application>
    </styles>

</chart>