Problem deleting ACLs

[dimon at intellinetinc.com]

Hi, I asked this question before but didn't get any answers at all

I'm getting strange error while trying to delete ACLs I created:
deleteaclmailbox: mailusers: Unexpected extra arguments to Deleteacl

Here is what I have:

localhost> lam user/dmitry
mailusers123 lrswipcda
group:mailusers lrswipcda
dmitry lrswipcda
mailusers lrswipcda

localhost> dam user/dmitry mailusers
deleteaclmailbox: mailusers: Unexpected extra arguments to Deleteacl

What could be a problem or maybe I'm doing something wrong?

Best regards,
Dmitry