Newbie install problems - please help

I am setting up The Perfect Server - CentOS 5.3 x86_64 [ISPConfig 3]. I am following the guide but are having issues when trying to install software through yum.

yum install amavisd-new
yum install clamav
yum install clamd

I get "No package 'the package name' available" for all 3. Does this mean the mirror I'm connecting to does not have the packages and is it possible to use another mirror to install them. If I can use another mirror how do I do that please.

Thanks in advance.

 

I think you have to add the rpmfusion repository for yum to find those packages.

 

Hi Doug G

Thanks so much exept for the clamd all worked and installed. Clamd still says no package available.