4 servers Netware 6 SP5
2 servers OES 2 Linux

yesterday, i have problem sync in nds: illegal time stamp, declare a new epoch

i had declared new epoch on master netware 6 and there is no problem with dsrepair.
So i wanted configure NCS on OES 2 linux and it failed to extension schema: NCS installed failed to extend schema
i use novel schema tools extension -> no problem
i retry to configure ncs --> Ncs installed failed.

So i use ldapexplorer and i'm afraid !!
When browse ldap on serveur OES linux , i see objet and schema
When i connect with ldapbrowser on netware server, i don't see schema.!!

Consequently, i deplace master replication on server OES 2 but i have always the problem.

Can you help me ?