Failed to customize the IDMProv


I'm using IDMProv 4.7.0 , and when I try to customize the "Task Notfications" on the "Work Dashboard" I am getting an error said : "Can not save the updated user preferences. Please contact your System Administrator.". The error in catalina.out log is :

" ERROR [com.novell.srvprv.impl.vdata.model.VirtualDataModel] (https-jsse-nio-8543-exec-7) [RBPM] Cannot save user preferences. Please contact your System Administrator. com.novell.srvprv.spi.vdata.exception.VirtualDataException: Ldap error updating object: cn=ABR,ou=Users,o=DOMAIN. Error: [LDAP: error code 65 - NDS error: missing mandatory (-609)]; remaining name 'cn=ABR,ou=Users,o=Domain "

I looked for solutions online, and I found that guide :

I did modify the attributes like said in the guide, but that did not solve the problem.

Any ideas ?