unable to open Berkeley db

[Dan Schaefer]

This has been a problem from day one of my postfix installation. I get 
the following error in my maillog:

postfix/smtpd[1088]: warning: SASL authentication problem: unable to 
open Berkeley db /etc/sasldb2: No such file or directory

This error appears sometimes 2-3 or more times in a row. I'm running 
Postfix with MySQL. Any other information needed? Thank you for your 
suggestions in advance.

--
Dan Schaefer
Web Developer/Systems Analyst
Performance Administration Corp.