Thêm Modules "locale"

Mọi người giúp e với ạ..... e mới làm quen với drupal 7.5
em đang kích hoạt modules locale để cài đặt tiếng việt cho trang web thì nó hiện lỗi thế này:
"Additional uncaught exception thrown while handling exception.
Original
PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'banhang.locales_source' doesn't exist: SELECT lid, location FROM {locales_source} WHERE source = :source AND context = :context AND textgroup = 'default'; Array ( [:source] => An AJAX HTTP error occurred. [:context] => ) in _locale_parse_js_file() (line 1599 of C:\XXampp\htdocs\banhang\includes\locale.inc).

Additional
PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'banhang.locales_source' doesn't exist: SELECT lid, location FROM {locales_source} WHERE source = :source AND context = :context AND textgroup = 'default'; Array ( [:source] => An AJAX HTTP error occurred. [:context] => ) in _locale_parse_js_file() (line 1599 of C:\XXampp\htdocs\banhang\includes\locale.inc)."

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