epel and rpmforge are a bit incompatible
you NEED the OLDER clamav from epel and you have a newer version installed from rpmforge
did you install and CONFIGURE "yum-priorities-plugin"
set it to use epel over rpmforge
then uninstall the RF version of clam
Code:
su -
yum remove clamd
yum clean all
yum install amavisd-new
with epel used OVER rf
the OLD clamav will install as a dependency