ERROR: http://bostonparentspaper.com/article/rss/index.php

Query: SELECT Article.id, MATCH (title) AGAINST ('nightmares nightmare') as title_score,MATCH (Article.fulltextsearch_keyword) AGAINST ('nightmares nightmare') as keyword_score FROM Article WHERE Article.status = 'A' AND Article.publication_date <= DATE_FORMAT(NOW(), '%Y-%m-%d') AND MATCH (Article.fulltextsearch_keyword) AGAINST ('nightmares nightmare' IN BOOLEAN MODE) AND Article.level IN (50)  ORDER BY Article.level, title_score DESC, keyword_score DESC LIMIT 100

 Errno: 1191
 Error: Can't find FULLTEXT index matching the column list
_SERVER data
    REMOTE_ADDR : 23.20.119.189
    REMOTE_PORT : 56599
SCRIPT_FILENAME : /var/www/html/parenthood.com/boston/article/rss/index.php
 REQUEST_METHOD : GET
   QUERY_STRING : keyword=nightmares
    REQUEST_URI : /article/rss/index.php?keyword=nightmares

ERROR: http://bostonparentspaper.com/article/rss/index.php

Query: SELECT Article.id, MATCH (title) AGAINST ('nightmares nightmare') as title_score,MATCH (Article.fulltextsearch_keyword) AGAINST ('nightmares nightmare') as keyword_score FROM Article WHERE Article.status = 'A' AND Article.publication_date <= DATE_FORMAT(NOW(), '%Y-%m-%d') AND MATCH (Article.fulltextsearch_keyword) AGAINST ('nightmares nightmare' IN BOOLEAN MODE)  ORDER BY Article.level, title_score DESC, keyword_score DESC LIMIT 100

 Errno: 1191
 Error: Can't find FULLTEXT index matching the column list
_SERVER data
    REMOTE_ADDR : 23.20.119.189
    REMOTE_PORT : 56599
SCRIPT_FILENAME : /var/www/html/parenthood.com/boston/article/rss/index.php
 REQUEST_METHOD : GET
   QUERY_STRING : keyword=nightmares
    REQUEST_URI : /article/rss/index.php?keyword=nightmares