Error installing on Redhat Enterprise Server 3

Hi.

I am trying to install avast! 4 on a Redhat Enterprise Server 3 box, I downloaded the two rpm’s from the website but when I try to install them I’m getting the following error:

error: Failed dependencies:
perl(URI::Split) is needed by libavastengine-4.7.1-1

I thought this was already installed so to check I did:

perl -MCPAN -e shell

cpan> install URI
install URI
URI is up to date (1.35).

I then want to check split was install so I tried:

cpan> install URI::Split
URI::Split is up to date (undef).

Just to double check I did:

rpm -qa |grep perl-URI

perl-URI-1.21-7

From what I can see perl(URI::Split) is installed, anyone got any ideas why avast! will not install?

Thanks in advance for any help.

Kind regards,

Andrew