A Database Error Occurred

Error Number: 1191

Can't find FULLTEXT index matching the column list

(SELECT *,MATCH(title,tag) AGAINST('do dil mil rahe hain pardes kumar sanu shahrukh khan amrish puri mahima chaudhry c32fc41e1c392c8f02850a91a545bcf4 04ci love')+1 as score FROM `full_screen_videostatus` where id <> 6939 AND status='show' AND action='approved' AND language like '%hindi%')UNION(SELECT *,MATCH(title,tag) AGAINST('do dil mil rahe hain pardes kumar sanu shahrukh khan amrish puri mahima chaudhry c32fc41e1c392c8f02850a91a545bcf4 04ci love')+1 as score FROM `video_status` where status='show' AND action='approved' AND language like '%hindi%')ORDER BY score DESC LIMIT 0,20

Filename: models/Video_view_m.php

Line Number: 45