Help! WordPress Database Error

Whooami – thanks for the help, but I am still not sure what to do. I ran a utility on it, and now even more messages appear on my homepage. (see below). Is “repairing my tables” something that I can do automatically, or do I have to look in the code?
Thanks.
-Dan

WordPress database error: [File ‘./blog/wp_bas_visitors.MYD’ not found (Errcode: 13)]
SELECT * FROM wp_bas_visitors, wp_bas_refer, wp_bas_ua, wp_bas_os WHERE referer = referer_id AND osystem = os_id AND useragent = ua_id AND lasthere > DATE_SUB(NOW(), INTERVAL 20 MINUTE) AND visit_ip = 1129553631 AND ua_string = ‘Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-us) AppleWebKit/419 (KHTML, like Gecko) Safari/419.3’ ORDER BY lasthere DESC LIMIT 1

WordPress database error: [File ‘./blog/wp_bas_visitors.MYD’ not found (Errcode: 13)]
INSERT INTO wp_bas_visitors (visit_ip, referer, osystem, useragent, lasthere) VALUES (1129553631, 1, 5, 2711, ‘2007-06-10 22:38:33’);

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘AND referer = referer_id AND osystem = os_id AND useragent = ua_]
SELECT * FROM wp_bas_visitors, wp_bas_refer, wp_bas_ua, wp_bas_os WHERE visit_id = AND referer = referer_id AND osystem = os_id AND useragent = ua_id

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘ ‘2007-06-10 22:38:33′, 0, 9)’ at line 1]
INSERT INTO wp_bas_log (visit, stamp, outbound, page) VALUES (, ‘2007-06-10 22:38:33’, 0, 9);