You need to check the health of your eDirectoryTM tree both before and after you extend the directory schema with ZENworks 6.5 attributes. The following resources provide the information required to perform the health check:
Directory Health Check Procedures - Cross Platform: TID 10060600, available in the Novell Support Knowledgebase.
Checking the OS and DS Health for Inconsistent ZENworks behavior: TID 10062741, available in the Novell Support Knowledgebase.