problemi con Database D7

Ricevo questo messaggio quando cerco di creare aricoli in book.
PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'niusando_2.cache_block' doesn't exist: DELETE FROM {cache_block} WHERE (expire <> :db_condition_placeholder_0) AND (expire < :db_condition_placeholder_1) ; Array ( [:db_condition_placeholder_0] => 0 [:db_condition_placeholder_1] => 1323972499 ) in cache_clear_all() (linea 169 di /home/niusando/public_html/drupal-7.10/includes/cache.inc)
Qualcuno mi da una dritta come farlo a riparare .