User disallowed after version upgrade

Hi,

After upgrading from 7.x-2.0-beta8 to 7.x-2.0-beta11, the users who tries to connect with ldap are not able to do so.

Here's the logs i'm getting:

username : Beginning authentification....
username : Existing Drupal User Account not found. Continuing on to attempt ldap authentication
username : Trying server ldap where bind_method = 1
username : Success at connecting to ldap
ldap_search() call: base_dn: OU=test,DC=test,DC=ca, filter = (samaccountname=username), attributes: , attrsonly = 0, sizelimit = 0, timelimit = 0, deref = , scope = 3
username : Authentication result id=0 auth_result=4 (User disallowed)
username : Failed ldap authentication. User may have authenticated successfully by other means in a mixed authentication site. LDAP Authentication Error #: 4 error message: User disallowed

Everything was fine before the upgrade.

Any idea why it doesn't work anymore? Do I need to change something in my configuration?

Thanks.