Redmine

Hello, this is my Redmine environment :

Environment:
Redmine version 3.2.1.stable
Ruby version 2.1.4-p265 (2014-10-27) [x86_64-linux]
Rails version 4.2.5.2
Environment production
Database adapter PostgreSQL 9.3
SCM:
Subversion 1.8.8
Git 1.9.1
Filesystem
Redmine plugins:
redmine_ldap_sync 2.0.8.devel.gc3a7f280ec

I have a issue with the redmine plugin "redmine_ldap_sync".

I can sync group with this plugin.
I can sync users with this plugin.
But I can't match user and groups.

Example :
In my Active Directory, I have a group named "Group_All".
In this group, I have user 1 & user 2.

When I try to sync this group, the group is created in Redmine but the users are not.

The plugin seems doesn't find users in this group.

And if I create manually user 1 in Redmine, the plugin locked this users because it dosen't find this user in the group.

You will find attached the configuration of my plugin.

I don't know what's wrong.

Sorry if I'm not very clear, I'm open to questions.

Thanks in advance.