about how to un-describe from pgsql-hackers

Hi, guys

i have already send a undescribe request to majordomo(at)postgresql(dot)org,
but i receive a reject reply.

who can tell me how to undescribe it ?

thanks.

>From: majordomo-owner(at)postgresql(dot)org
>Reply-To: majordomo(at)postgresql(dot)org
>To: "zhou bo" <tate_zhou(at)hotmail(dot)com>
>Subject: Majordomo results: unsubscribe pgsql-hackers
>Date: Fri, 01 Sep 2006 08:27:30 -0300
>
>
> >>>> unsubscribe pgsql-hackers
>**** The unsubscribe command did not succeed.
>****
>**** No e-mail addresses matching
>**** "zhou bo" <tate_zhou(at)hotmail(dot)com>
>**** are subscribed to the pgsql-hackers mailing list.
>****
>
>Valid commands processed: 1
>0 succeeded, 0 stalled, and 1 failed.
>
>
>Use the following command:
> sessioninfo 15453d661d9e06ac044850d282fbe5935edba4bd
>to see technical information about this session.
>