Postfix+cyrus-sasl2+mysql

Hi,

Recently I installed postfix+mysql+cyrus-sasl2 (os: FreeBSD 7.0 stable ,
software installed from ports).
I use mysql to store users passwords. Everything has been installed
without any problem but... When I trying to connect to the server and
check if my configuration works - it doesn't.
I use tcpdump to check connection between mysql and postfix.
Everything works fine. I can connect to mysql , I get response from server but
in the end I get
warning: unknown: SASL LOGIN authentication failed: another step is needed in authentication
postfix/smtpd[91142]: > unknown: 535 5.7.0 Error: authentication failed: another step is needed in authentication
I don't know what can cause this problem. Maybe someone can point me what I'm doing wrong.

Best regards,

Sebastian