Big Error when going to User default tab

Just installed the module, configured the first pane ,and when I go to the User default tab, I got these errors :

# user warning: Table 'soufflecourt.dp_subscriptions' doesn't exist query: SELECT module, field, count(1) as number FROM dp_subscriptions WHERE recipient_uid = -2 GROUP BY module, field in D:\Taf\drupal5\includes\database.mysqli.inc on line 151.
# user warning: Table 'soufflecourt.dp_subscriptions_user' doesn't exist query: SELECT uid, digest, send_interval, send_updates, send_comments, send_interval_visible, send_updates_visible, send_comments_visible, autosub_on_post, autosub_on_update, autosub_on_comment, send_self FROM dp_subscriptions_user WHERE uid in (-2, -2) ORDER BY uid in D:\Taf\drupal5\includes\database.mysqli.inc on line 151.
# warning: Invalid argument supplied for foreach() in D:\Taf\drupal5\sites\all\modules\subscriptions\subscriptions.module on line 492.

Any suggestion how to fix that?