ClamAV definitions update problem

[homyang cha]

Hello Ladies and Gentlemen
Recently I have updated mailscanner to 4.79.11-1 and ClamAV 0.96 and
SpamAssassin 3.3.0 easy installation package. in my CentOS 5.5 server, arch
x86_64 using postfix as MTA. Everything went well except clamav definitions
update. I tried looking for the solutions in documents and support pages of
mailscanner plus the list archieves but to no avail. I even tried googling
but could not get any solutions. The problem is when i do MailScanner --lint
it shows;

LibClamAV Warning: **************************************************
LibClamAV Warning: ***  The virus database is older than 7 days!  ***
LibClamAV Warning: ***   Please update it as soon as possible.    ***
LibClamAV Warning: **************************************************

When I looked at the log file; more /var/log/maillog it shows;

mysystem ClamAV-autoupdate[4827]: ClamAV update warning: ERROR: getpatch:
Can't download daily-10848.cdiff from database.clamav.net
mysystem ClamAV-autoupdate[4827]: ClamAV updater failed
mysystem update.virus.scanners: Found generic installed
mysystem update.virus.scanners: Running autoupdate for generic

And when I try to update virus definitions manually with command freshclam
it shows

ClamAV update process started at Sun May 23 18:55:11 2010
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.96 Recommended version: 0.96.1
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder:
sven)
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
Trying host database.clamav.net (61.177.194.226)...
Downloading daily.cvd [100%]
WARNING: Mirror 61.177.194.226 is not synchronized.
Trying again in 5 secs...
ClamAV update process started at Sun May 23 18:55:44 2010
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.96 Recommended version: 0.96.1
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder:
sven)
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
Trying host database.clamav.net (61.177.194.226)...
Downloading daily.cvd [100%]
WARNING: Mirror 61.177.194.226 is not synchronized.
Trying again in 5 secs...
ClamAV update process started at Sun May 23 18:56:16 2010
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.96 Recommended version: 0.96.1
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder:
sven)
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
WARNING: getpatch: Can't download daily-10848.cdiff from database.clamav.net
Trying host database.clamav.net (61.177.194.226)...
WARNING: getfile: daily-10848.cdiff not found on remote server (IP:
61.177.194.226)
ERROR: getpatch: Can't download daily-10848.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
Trying host database.clamav.net (61.177.194.226)...
Downloading daily.cvd [100%]
WARNING: Mirror 61.177.194.226 is not synchronized.
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in
/usr/local/etc/freshclam.conf is working. Check
http://www.clamav.net/support/mirror-problem for possible reasons.

What could be the possible reasons for the same? Please help if you have any
idea on this or show me the link to the solutions.

Thanks in advance.

Homyang
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