unsubscribe from closed list

[Thanh Vu <vu @ zaphod . nosc . mil>]

hi,
i am trying to unsubscribe from a closed list, and i get the below message
back without the indication of suceeded or failed.   and, i don't get any
message in the list owner's account.

>>>> unsubscribe testlist

does any body know what did i do wrong? any suggestions will be appreciated

Thanks,
thanh.