Apache::DBI problems

[Rithe]

I'm working on installing OTRS (from tar.gz, not through emerge), and have a problem starting Apache2. I need Apache::DBI, but it seems like it's not starting up at all. At first I didn't have it, so I just emerged it. I put "PerlModule Apache::DBI" in my apache2.conf (I also have an otrs.conf and tried it there) but it fails.
OTRS has a perl startup script that I am trying to run, and in the error log it tells me:

Can't locate object method "connect_on_init" via package "Apache::DBI" (perhaps you forgot to load "Apache::DBI"?) at /opt/otrs/scripts/apache2-perl-startup.pl line 24.

I know I'm missing something, I just don't know what it is right now.