[Dovecot] director userdb problem

[Костырев Александр Алексеевич]

hello !

I'm trying to get users from dovecot director server:
doveadm director map
doveadm(root): Error: User listing returned failure
doveadm(root): Error: user listing failed
user                                                                mail server ip expire time        
<unknown>                                                           192.168.5.101  2012-06-10 21:54:06

in logs I get:
Jun 10 21:41:14 mail-lvsm dovecot: auth-worker(17510): mysql(172.5.14.1): Connected to database EXIM
Jun 10 21:41:14 mail-lvsm dovecot: auth-worker(17510): Warning: mysql: Query failed, retrying: Table 'EXIM.users' doesn't exist
Jun 10 21:41:14 mail-lvsm dovecot: auth-worker(17510): Error: sql: Iterate query failed: Table 'EXIM.users' doesn't exist (using built-in default iterate_query: SELECT username, domain FROM users)

in my dovecot.conf I have:
userdb {
  driver = sql
  args = /etc/dovecot/dovecot-sql.conf
}
passdb {
  driver = static
  args = proxy=y nopassword=y
}
and in /etc/dovecot/dovecot-sql.conf:
user_query = select MBOX_NAME AS user from M_MAILBOX WHERE (MBOX_NAME = '%u');

Do I have to use special table named users ? is it hard-coded?