Keep getting a freshclam warning message in my logwatch report

==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Linux/BSD distribution name and version:  CentOS 6.5 x64bit
- Related log if you're reporting an issue: "No updates detected in the log for the freshclam daemon (the
ClamAV update process).  If the freshclam daemon is not running,
you may need to restart it.  Other options:"

I keep getting the above message as of a fresh install of iRedmail, what could be the reason for this? I did try and restart using service freshclam but nothing happens just comes up with this:

"freshclam: unrecognized service"

Thanks in advance,
Jeremy.
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