no table creation

i install visitors in modules directory and go admin build module to activate, but it do not create table in database.

i use drupal 6.13; i have a prb only with this module... strange ?

so i have this:

* warning: pg_query() [function.pg-query]: Query failed: ERREUR: la relation « visitors » n'existe pas in includes/database.pgsql.inc on line 139.
* user warning: query: INSERT INTO visitors (visitors_uid, visitors_ip, visitors_date_time, visitors_url, visitors_referer, visitors_path, visitors_title, visitors_user_agent ) VALUES ('1', '1391911804', UNIX_TIMESTAMP(NOW()), 'http://www.XXX.org/admin/build/modules/list/confirm', 'http://www.XXXX.org/admin/build/modules', 'admin/build/modules/list/confirm', 'Liste', 'Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.0.11) Gecko/2009061319 Iceweasel/3.0.11 (Debian-3.0.11-1)' ) in modules/visitors/visitors.module on line 267.