error message

When I enable the module for the fisrt time, and click in "Affiliates Home" in the Navigation Links, this give me a RED mensage:


user warning: Unknown column 'ac.weight' in 'order clause' query: SELECT aa.*, ac.cat_name FROM affiliates_ads aa INNER JOIN affiliates_cats ac ON ac.cat_id = aa.cat_id WHERE status = 'A' ORDER BY ac.weight ASC, aa.order_by ASC in C:\wamp\www\drupal\modules\affiliates\affiliates.module on line 943.




anyone to help me please...