اشکال در کوئری

$up = $db -> query("UPDATE `termone` SET ajalase1 = '".$_POST['activeplrof']."' where struct='".$_POST['struct']."' AND stage='".$_POST['stage']."' AND classname='".$_POST['classname']."' AND term='".$_POST['term']."' AND yearclg='".$_POST['year']."' ");