samba - Mar 2012 - Samba4: Unknown parameter encountered: "secrets database"

Hi

I'm transferring some acl's. They seem to work OK but I get an error. 
e.g. copying the acl from directory sd to directory sd2:

samba-tool ntacl get --as-sddl sd
O:S-1-5-21-443838659-2890314986-1722269781-500G:S-1-5-21-443838659-2890314986-1722269781-1118D:(A;;0x001f01ff;;;SY)(A;OICI;0x001301bf;;;S-1-5-21-443838659-2890314986-1722269781-1118)(A;OICI;0x001f01ff;;;S-1-5-21-443838659-2890314986-1722269781-500)


samba-tool ntacl set 
"O:S-1-5-21-443838659-2890314986-1722269781-500G:S-1-5-21-443838659-2890314986-1722269781-1118D:(A;;0x001f01ff;;;SY)(A;OICI;0x001301bf;;;S-1-5-21-443838659-2890314986-1722269781-1118)(A;OICI;0x001f01ff;;;S-1-5-21-443838659-2890314986-1722269781-500)"
sd2
Unknown parameter encountered: "secrets database"

1. Am I doing anything wrong?
2. Is there any correspondence between posix acl's, ntacl, nfs4acl,linux 
file permissions and what I write in smb.conf? Is there any priority?

Thanks.
Steve