Fehler bei Simpletest

Hallo!

Ich habe das Modul Testing aktiviert. Wenn ich nun einen Test ausführen möchte (egal welchen) kommt folgende Fehlermeldung.

Woran liegt das?

Danke!

Ein AJAX-HTTP-Fehler ist aufgetreten HTTP-Rückgabe-Code: 200 Im Folgenden finden Sie Debugging-Informationen. Pfad: /batch?render=overlay&id=37&op=do Statustext: OK Antworttext: Additional uncaught exception thrown while handling exception.OriginalPDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'xxx_drupal.simpletest570758semaphore' doesn't exist: SELECT expire, value FROM {semaphore} WHERE name = :name; Array ( [:name] => locale_cache_de ) in lock_may_be_available() (line 165 of /usr/home/xxx/public_html/drupal/includes/lock.inc).AdditionalPDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'xxx_drupal.simpletest570758registry' doesn't exist: SELECT filename FROM {registry} WHERE name = :name AND type = :type; Array ( [:name] => FirePHP [:type] => class ) in _registry_check_code() (line 2800 of /usr/home/xxx/public_html/drupal/includes/bootstrap.inc).Uncaught exception thrown in shutdown function.PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'xxx_drupal.simpletest570758semaphore' doesn't exist: DELETE FROM {semaphore} WHERE (value = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 16707800844d3fe2e72c2c93.95952079 ) in lock_release_all() (line 247 of /usr/home/xxx/public_html/drupal/includes/lock.inc).Uncaught exception thrown in session handler.PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'xxx_drupal.simpletest570758sessions' doesn't exist: SELECT 1 AS expression FROM {sessions} sessions WHERE ( (sid = :db_condition_placeholder_0) AND (ssid = :db_condition_placeholder_1) ) FOR UPDATE; Array ( [:db_condition_placeholder_0] => bkzGQeHNeVrHxVUwIjTvb8MlKTWiqPnz8xqg4GgpDjM [:db_condition_placeholder_1] => ) in _drupal_session_write() (line 204 of /usr/home/xxx/public_html/drupal/includes/session.inc).