[Zope] [HELP] Zope local roles and LDAP Groups

Hello, I use Zope / CMF / LDAPUserFolder for some Intranet sites. But i have a problem with LDAP groups : I have some Groups of users defined in my LDAP annuary ==> Ok I use these LDAP-Groups to define "local roles", in some Folders ==> Ok But it doesn't seem to work : If i define the local role "Manager" for the LDAP-group "Informatique", when a user "flemaitre" (from this group) is authenticated, he doesn't have the permissions that i have given to the group "Informatique" Have someone any idea ? Is there any easy way to use LDAP Groups in Zope ? Thanks in advance. PS : Excuse my english... Fred.