รบวนพี่ๆช่วยดูทีครับ อ้างอิง code มาจากพี่ mr.win รันแล้ว error ตรง case

$sql_dss = "	select	*
					from 		house h, facility f, public p
					where 	h.HouseID = p.HouseID 
					and 		h.HouseID = f.HouseID  ";
				
switch($_REQUEST['Price'])
case 0 : $sql_dss.= " and h.Price is Null "; break;
case 1 : $sql_dss.= " and h.Price < 2000000 "; break;
case 2 : $sql_dss.= " and h.Price between 2000000 and 5000000   "; break;
case 5 : $sql_dss.= " and h.Price >5000000 "; break;

$result_dss = mysql_query($sql_dss) or die ( mysql_error()) ;	
$arr_dss =	 mysql_fetch_array($result_dss);
print_r ($arr_dss); 	

<?
	$strSQL = "SELECT * FROM table WHERE 1 ";

	if($_POST["txt1"] != "")
	{
		$strSQL .= " AND F1 = '".$_POST["txt1"]."' ";
	}

	if($_POST["txt2"] != "")
	{
		$strSQL .= " AND F2 = '".$_POST["txt2"]."' ";
	}
?>