Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/c/cellarti/www/customer/includes/common.inc:2561) in drupal_send_headers() (line 1040 of /home/c/cellarti/www/customer/includes/bootstrap.inc).
• PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens: SELECT f.entity_id FROM field_data_field_expire_date f WHERE f.field_expire_date_value < :date ; Array ( [:null] => [:date] => 2012-02-23 ) in fetch_expire_date() (line 41 of /home/c/cellarti/www/customer/sites/all/modules/expire_user/expire_user.module).