MySQL query error: file - , line -

SELECT a.r_name,b.enable,b.bots,a.r_id, COUNT(*) as kv FROM sp_li_razdel a,sp_li_link_info b,sp_li_back_link c WHERE a.r_id=b.r_id AND c.id=b.id AND c.s_id=1 AND b.enable=1 GROUP BY b.r_id

Unknown column 'b.enable' in 'field list'