Error trying to connect with Perl script

Hello,
I am trying to setup the Perl DBI for Pg, and when I call
DBI->data_sources($driver); and then DBI->data_sources($driver); to test my
setup, I get an error that reads:

DBD::Pg initialisation failed: Can't locate object method "driver" via
package "DBD::Pg" at /usr/lib/perl5/site_perl/5.005/i586-linux/DBI.pm line
481.

I am using:
Perl 5.005_03, stock install from SuSE 6.3.
PostgreSQL 6.5.3, compiled myself.
DBI-1.13
pgsql_perl5-1.8.1

Everything was installed in the order I listed. $POSTGRES_HOME is set to
/usr/local/pgsql/ which is obviously where PostgreSQL is installed.

All commands from psql work fine.

Anyone have any ideas?