Dovecot, Squirrelmail, Avelsieve

[jirkami]

Hello,
I have problem with auth by avelsieve plugin. I setted all by Howto on ISPcp page. The relevant part of maillog:

Dec 18 10:02:06 d741 pysieved[4563]: Connect from ('127.0.0.1', 57837)
Dec 18 10:02:06 d741 dovecot: auth-worker(pysieved): sql(jirka.mai@sporthall.cz): Password query failed: Table 'ispcp.users' doesn't exist
Dec 18 10:02:06 d741 dovecot: auth-worker(pysieved): sql(jirka.mai@sporthall.cz): Password query failed: Table 'ispcp.users' doesn't exist

Can you explain me, where can I change the table for mysql query?