lmtp error

[unplug]

Hi all,

  When I receive mail, I got the following error in the messages log.

May  3 09:41:15 mail lmtpd[4116]: unable to open Berkeley db
/etc/sasldb: Invalid argument

  What is the meaning of the above error??  How can I fix it??  I have
no idea 
to handle it.

my config:
Linux6.1
cyrus imap2.0.12
open-ldap2.07

Rgds,
unplug