saslauthd dying

[finth]

Hello.

I'm installed last version of Zimbra to the CentOS 5.5 server. The problem is below: saslauthd constantly dying after 5-10 min timeslot. Example:

$ zmcontrol status
Host xxxxxxxxxxxxxxxxxxxxxxx
antispam Running
antivirus Running
ldap Running
logger Stopped
zmlogswatchctl is not running
mailbox Running
mta Running
snmp Running

Now, after waiting about 10-20 minutes in the zimbra.log we see this:

Aug 10 15:40:03 xxxxxxxxxx saslauthd[16898]: server_exit : master exited: 16898

Check status:
$ zmcontrol status
Host xxxxxxxxxxxxxxxxxxx
antispam Running
antivirus Running
ldap Running
logger Stopped
zmlogswatchctl is not running
mailbox Running
mta Stopped
zmsaslauthdctl is not running
snmp Running
stats Running

This happens immediately after installation - zimbra is in the default configuration and server is not under load.

Google cannot answer me to this question. Help is welcome.