I have a PHP file that sets up a few tables and when i run the script i get
this error

The used table type doesn't support FULLTEXT indexes

What does it mean?

Heres the code that sets up the table

CREATE TABLE IF NOT EXISTS cms_articles (
article_id int(11) NOT NULL auto_increment,
author_id int(11) NOT NULL default '0',
is_published tinyint(1) NOT NULL default '0',
date_submitted datetime NOT NULL default '0000-00-00 00:00:00',
date_published datetime NOT NULL default '0000-00-00 00:00:00',
title varchar(255) NOT NULL default '',
body mediumtext NOT NULL,
PRIMARY KEY (article_id),
KEY IdxArticle (author_id,date_submitted),
FULLTEXT INDEX IdxText (title,body)
)

Thanks in Advance