How can i tell SASL2 to stop using /etc/sasldb2 ?

[Gert Cuykens]

I am trying to tell SASL2 to use pam instead of /etc/sasldb2 by
following this instructions

http://small.dropbear.id.au/myscripts/postfixmysql.html

But Pam doesn't get used ?
My /etc/postfix/sasl/smtpd.conf looks like this ?
pwcheck_method: pam

And my /etc/pam.d/smtp looks like
auth required pam_mysql.so user=postfix passwd=secret db=postfixdb
table=users usercolumn=id passwdcolumn=password crypt=0

Still got the same  /etc/sasldb2 error in my mail.err log
SASL authentication problem: unable to open Berkeley db /etc/sasldb2