Question Search Plugin does not work

$query = "SELECT m.id, m.subject AS title, m.catid, m.thread, m.name, m.time AS created, t.mesid, t.message AS text, m.ordering, mm.hits, c.name AS section, 1 AS browsernav FROM #__fb_messages_text AS t INNER JOIN #__fb_messages AS m ON m.id=t.mesid INNER JOIN #__fb_messages AS mm ON mm.id=m.thread INNER JOIN #__fb_categories AS c ON m.catid = c.id WHERE {$where} AND m.moved=0 AND m.hold=0 AND mm.hold=0 AND mm.catid IN ({$ksession->allowed}) GROUP BY m.thread ORDER BY {$order}";

$query = "SELECT m.id, m.subject AS title, m.catid, m.thread, m.name, m.time AS created, t.mesid, t.message AS text, m.ordering, mm.hits, c.name AS section, 1 AS browsernav FROM #__kunena_messages_text AS t INNER JOIN #__kunena_messages AS m ON m.id=t.mesid INNER JOIN #__kunena_messages AS mm ON mm.id=m.thread INNER JOIN #__kunena_categories AS c ON m.catid = c.id WHERE {$where} AND m.moved=0 AND m.hold=0 AND mm.hold=0 AND mm.catid IN ({$ksession->allowed}) GROUP BY m.thread ORDER BY {$order}";