PHP AD LDAP Authenticator

I created a AD Security Group - Domain Local (I tried this at all 3 levels) called 'Kayako_Staff_Team'.

I added my user in this group.

I set my config file to be :
$staff_groups = array('Group' => 'Kayako_Staff_Team');

When I try to log in, I get the following msg :
[10-29-12 - 17:40] KAYAKO_LDAP_TEST: true
[10-29-12 - 17:40] Authenticated: true
[10-29-12 - 17:40] HTML Test: staff
[10-29-12 - 17:40] Type: 'staff'
[10-29-12 - 17:40] Staff groups are enabled
[10-29-12 - 17:40] Staff group not found. Error message sent
[10-29-12 - 17:40] <loginshare>
<result>0</result>
<message>User is not in a valid AD staff group</message>
</loginshare>

I tested using the ldap.html for the user side, and it was able to retrieve my full name and email address. So the ldap connection works. Any clues on what I'm missing?

I tried to change Group to be "Customer Service" Which is the name of the team. But that didn't help.
$staff_groups = array('Group' => 'Kayako_Staff_Team');