postfix - sasl - mysql

I use Redhat 9 and I want to use postfix + sasl2 auth for smtpd server. I
installed postfix with sasl2 support, and compiled sasl2 with mysql
support. The problem occur when I try to send a mail. I receive this error:

Jan 19 14:24:29 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:29 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:29 stan postfix/smtpd[5943]: warning: SASL authentication failure: no secret in database
Jan 19 14:24:29 stan postfix/smtpd[5943]: warning: [172.26.0.233]: SASL CRAM-MD5 authentication failed
Jan 19 14:24:30 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:30 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:30 stan postfix/smtpd[5943]: warning: SASL authentication problem: unknown password verifier
Jan 19 14:24:30 stan postfix/smtpd[5943]: warning: SASL authentication failure: Password verification failed
Jan 19 14:24:30 stan postfix/smtpd[5943]: warning: [172.26.0.233]: SASL PLAIN authentication failed
Jan 19 14:24:31 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:31 stan postfix/smtpd[5943]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory
Jan 19 14:24:31 stan postfix/smtpd[5943]: warning: SASL authentication problem: unknown password verifier

I don't know why smtpd try to access to /etc/sasldb2 file. I want to
access to mysql database :(

My /usr/lib/sasl2/smtpd.conf is:
mysql_user: mail
mysql_passwd: cipriano
mysql_hostnames: localhost
mysql_database: mail
mysql_statement: select clear from users where id='%u' and domain='%r'
pwcheck_method: mysql
mysql_uidcol: id
mysql_pwdcol: clear

Too I have tried with this:
mysql_user: mail
mysql_passwd: cipriano
mysql_hostnames: localhost
mysql_database: mail
mysql_statement: select clear from users where id='%u' and domain='%r'
pwcheck_method: auxprop

Can you help me? thanks