Error after a new installation of Drupal + Ecommerce

Hi guys,
after a new installation of Drupal 6.14 and ecommerce module ecommerce-6.x-4.0-rc14 when i go to enabled the base modules Token,
Store, Anonymous Purchasing as indicated in this official guide http://www.drupalecommerce.org/content/installation the Drupal system show me this message:

user warning: Invalid default value for 'anon_policy' query: ALTER TABLE ec_product ADD anon_policy TINYINT NOT NULL DEFAULT 'ECANON_POLICY_OPTIONAL' in /var/www/testdrupal/includes/database.mysql-common.inc on line 298.

It's the first time that I use Drupal and don't know if this is real problem or not.

After that I try to insert a product and the Drupal System show me this other warning message:

user warning: Unknown column 'anon_policy' in 'field list' query: INSERT INTO ec_product (nid, vid, ptype, sku, price, anon_policy) VALUES (1, 1, 'generic', '', 400, 2) in /var/www/testdrupal/includes/common.inc on line 3468.

Have you some suggest for me?

Thanks
Panthe

(Scuse me for my bad english)