Hi,
Have you removed the default admin account? This is a known error across everywhere and results in loads of problems including firmware updates.
You can only remove the admin account using the CLI but whe you do just realise that firmware updates across both controllers won't be syncronised. You'll have to do them manually.
This puzzled HP for about six months until they sent my P2000's back to DotHill (the OEM) across the world for diagnosis.
John