Groupwise Driver

I am creating user with the version 2.1.4.

when i try to add a user in a distribution i get the following error

Message 1 :
Tue Jul 11 15:37:26 EDT 2006
Warning
No description provided.
Code(-8003) Unable to synchronize reference to BREBEUF\GRPWISE\Liste
Distribution\LD - Etudiants collegial from attribute Distribution List DN.

Any help is deeply appreciated.