-FROM `{!MYSQL_PREFIX!}_guest_menu`
-WHERE action='main' AND what != '' AND what IS NOT NULL AND locked='N'
-ORDER BY sort ASC", __FILE__, __LINE__);
+FROM `{!_MYSQL_PREFIX!}_guest_menu`
+WHERE `action`='main' AND `what` != '' AND `what` IS NOT NULL AND `locked`='N'
+ORDER BY `sort` ASC", __FILE__, __LINE__);