Ocurrió un Error con la Base de Datos

Error Number: 1191

Can't find FULLTEXT index matching the column list

SELECT id,tabla,tabla,contenido,titulo, MATCH(tabla,contenido,titulo) AGAINST('*ãƒæ’ã†â€™ãƒâ€ã¢â‚¬â„¢ãƒæ’ã¢â‚¬âãƒâ¢ã¢â€šâ¬ã¢â€žâ¢ãƒæ’ã†â€™ãƒâ¢ã¢â€šâ¬ã‚âã*' IN BOOLEAN MODE) AS relevancia FROM contenidos WHERE MATCH(tabla,contenido,titulo) AGAINST('*ãƒæ’ã†â€™ãƒâ€ã¢â‚¬â„¢ãƒæ’ã¢â‚¬âãƒâ¢ã¢â€šâ¬ã¢â€žâ¢ãƒæ’ã†â€™ãƒâ¢ã¢â€šâ¬ã‚âã*' IN BOOLEAN MODE)

Filename: /homepages/17/d411370337/htdocs/WEBS/triphasik/models/buscar_model.php

Line Number: 63