Problem authenticating postfix users with cyrus sasl saslauthd: unable to open Berkeley db /etc/sasldb2: No such file or directory

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Problem authenticating postfix users with cyrus...
\ Denis Maggiorotto (23 Jul 2007)
. \ Patrick Ben Koetter (23 Jul 2007)

19 msg	sender address verification vs. script-generate...

Subject:	Problem authenticating postfix users with cyrus sasl saslauthd: unable to open Berkeley db /etc/sasldb2: No such file or directory
Group:	Postfix-users
From:	Denis Maggiorotto
Date:	23 Jul 2007

Hi all,
I'm trying to configure postfix in order to accept only authenticated
user with cyrus-sasl. In my scenario users must be authenticated against
/etc/shadow using saslauthd.
The saslauthd daemon is properly configured to use shadow mechanism and
serve only plain or login anthentication methods but unfortunately an
error pops out in the log file:

connect from unknown[192.168.1.65]
Jul 23 18:09:27 skmail2 postfix/smtpd[28635]: warning: SASL
authentication problem: unable to open Berkeley db /etc/sasldb2: No such
file or directory
Jul 23 18:09:27 skmail2 postfix/smtpd[28635]: warning: SASL
authentication problem: unable to open Berkeley db /etc/sasldb2: No such
file or directory
Jul 23 18:09:27 skmail2 postfix/smtpd[28635]: warning:
unknown[192.168.1.65]: SASL LOGIN authentication failed: authentication
failure
Jul 23 18:09:27 skmail2 postfix/smtpd[28635]: lost connection after AUTH
from unknown[192.168.1.65]
Jul 23 18:09:27 skmail2 postfix/smtpd[28635]: disconnect from
unknown[192.168.1.65]

The authentication fails and users are not authorized to send emails.
It seams that cyrus is trying to authenticate users against his db file
and not against the system's /etc/shadow as i expect.

Do you have any clue about this error? Have you ever faced it?
Any idea about the solution?

This is my software version and configuration:

Host:
SUSE Linux Enterprise Server 10 SP1 (x86_64)
Linux skmail2 2.6.16.46-0.12-default #1 Thu May 17 14:00:09 UTC
2007 x86_64 x86_64 x86_64 GNU/Linux

Software:
postfix v. 2.3.7
cyrus-sasl-saslauthd 2.1.21-18.4

Configuration:
/usr/lib/sasl2/smtpd.conf
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN

/etc/sysconfig/saslauthd
SASLAUTHD_AUTHMECH=shadow

/etc/postfix/main.cf
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sender_restrictions =
permit_sasl_authenticated,permit_mynetworks,reject
smtpd_recipient_restrictions =
permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination
smtpd_sasl_type = cyrus
smtpd_sasl_path = smtpd

Best regards,
Denis Maggiorotto