Ive tried installing this module and the dev version of it. Both give me these errors. What am I doing wrong?

# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "user_activity" does not exist in /usr/share/drupal6/includes/database.pgsql.inc on line 139.
# user warning: query: SELECT uid FROM user_activity WHERE uid=1 LIMIT 1 in /usr/share/drupal6/sites/handbelltalk.com/modules/user_activity/user_activity.module on line 224.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "user_activity" does not exist in /usr/share/drupal6/includes/database.pgsql.inc on line 139.
# user warning: query: INSERT INTO user_activity (uid, pis, logins, timestamp) VALUES (1, 1, 1, 1299010241) in /usr/share/drupal6/sites/handbelltalk.com/modules/user_activity/user_activity.module on line 253.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "user_activity" does not exist in /usr/share/drupal6/includes/database.pgsql.inc on line 139.
# user warning: query: UPDATE user_activity SET pis=pis+1 WHERE uid=1 in /usr/share/drupal6/sites/handbelltalk.com/modules/user_activity/user_activity.module on line 244.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "user_activity" does not exist in /usr/share/drupal6/includes/database.pgsql.inc on line 139.
# user warning: query: SELECT idx FROM user_activity WHERE uid=1 in /usr/share/drupal6/sites/handbelltalk.com/modules/user_activity/user_activity.module on line 350.