OSX snowleopard server mailserver Clamav issue

when I used the serveradmin to watch the System log.

I saw the error message log :

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Warning: **************************************************

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Warning: ***  The virus database is older than 7 days!  ***

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Warning: ***   Please update it as soon as possible.    ***

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Warning: **************************************************

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Error: cli_loadinfo: Digital signature not found

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Error: Can't load daily.info: Malformed database

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Error: cli_tgzload: Can't load daily.info

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: LibClamAV Error: Can't load /var/clamav/daily.cvd: Malformed database

Apr 28 00:30:07 macminiserver org.clamav.clamd[11273]: ERROR: Malformed database

Apr 28 00:30:07 macminiserver com.apple.launchd[1] (org.clamav.clamd[11273]): Exited with exit code: 1

Apr 28 00:30:07 macminiserver com.apple.launchd[1] (org.clamav.clamd): Throttling respawn: Will start in 10 seconds

then I restart my clamav freshclam and update clamav

#sudo launchctl unload -w /System/Library/LaunchDaemons/org.clamav.freshclam.plist

#sudo launchctl load -w /System/Library/LaunchDaemons/org.clamav.freshclam.plist

after this command, we can check the log in the serveradmin and it will start to update the virus database. And the error log does not appear again.

The next one is my web survey and the other issue.

Aug 14 21:16:29 miniserver org.clamav.freshclam[2481]: ERROR: Problem with internal logger (UpdateLogFile = /var/log/freshclam.log).
Aug 14 21:16:29 miniserver org.clamav.freshclam[2481]: ERROR: Can't open /var/log/freshclam.log in append mode (check permissions!).
Aug 14 21:16:29 miniserver com.apple.launchd[1] (org.clamav.freshclam[2481]): Exited with exit code: 62
Aug 14 21:16:29 miniserver com.apple.launchd[1] (org.clamav.freshclam): Throttling respawn: Will start in 10 seconds
Aug 14 21:16:33 miniserver org.clamav.clamd[2482]: ERROR: Can't initialize the internal logger
Aug 14 21:16:33 miniserver org.clamav.clamd[2482]: ERROR: Can't open /var/log/clamav.log in append mode (check permissions!).
Aug 14 21:16:33 miniserver com.apple.launchd[1] (org.clamav.clamd[2482]): Exited with exit code: 1
Aug 14 21:16:33 miniserver com.apple.launchd[1] (org.clamav.clamd): Throttling respawn: Will start in 10 seconds

#sudo touch /var/log/clamav.log

#sudo chmod 640 /var/log/clamav.log

#sudo chown _amavisd:admin /var/log/clamav.log