fulltext index problem

[vu the cuong]

I studying mysql 4.1 according to ebook of Sybex: mastering MySQL 4. I have the following prob related to fulltext index:

I created a table as follow:
CREATE TABLE ft(f1 VARCHAR(255),f2 TEXT,f3 BLOB,f4 INT);

and then I add fulltext index as follow:
ALTER TABLE ft ADD FULLTEXT (f1,f2);

But error occured:
Error Code : 1214
The used table type doesn't support FULLTEXT indexes
(0 ms taken)


Could anyone tell me where is my wrong?
many thanks