postgresql perl connectivity

hi people
i am trying to connect to ppstgresql on a debian system using perl . i
am getting the following error .can any one please suggest what has to
be done


install_driver(pg) failed: Can't locate DBD/pg.pm in @INC (@INC
contains: /etc/perl /usr/local/lib/perl/5.8.3
/usr/local/share/perl/5.8.3 /usr/lib/perl5 /usr/share/perl5
/usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at
(eval 1) line 3.
Perhaps the DBD::pg perl module hasn't been fully installed,
or perhaps the capitalisation of 'pg' isn't right.
Available drivers: ExampleP, Pg, Proxy, Sponge, mysql.
 at psqldb.pl line 10


 thanks
jay