just upgraded 2.3-beta2 from beta1. but DB error is still there! (inc error msg)

when I try to edit some post or write some comment, this error pops up! (WRITE POST IS OK)

it happen on 2.3-beta1, so i just upgraded fresh installed 2.3-beta1 to 2.3-beta2. but still the same.

what should i do?

WordPress database error: [Table ‘thecancer.gaepo_post2cat’ doesn’t exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM gaepo_posts p LEFT JOIN gaepo_post2cat pc ON p.ID = pc.post_id LEFT JOIN gaepo_categories c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID

WordPress database error: [Table ‘thecancer.gaepo_post2cat’ doesn’t exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM gaepo_posts p LEFT JOIN gaepo_post2cat pc ON p.ID = pc.post_id LEFT JOIN gaepo_categories c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID

Warning: Cannot modify header information – headers already sent by (output started at /home/hosting_users/thecancer/www/gaepo/wp-includes/wp-db.php:159) in /home/hosting_users/thecancer/www/gaepo/wp-includes/pluggable.php on line 422