Pg.pm question

When I run a perl script named enc.pl I get this error.  It looks like Pg.pm can't resolve something when it reaches the line: bootstrap Pg $VERSION;

Can't locate loadable object for module Pg in @INC (@INC contains: /usr/lib/perl5/5.6.0/i386-linux /usr/lib/perl5/5.6.0 /usr/lib/perl5/site_perl/5.6.0/i386-linux /usr/lib/perl5/site_perl/5.6.0 /usr/lib/perl5/site_perl/5.005/i386-linux /usr/lib/perl5/site_perl/5.005 /usr/lib/perl5/site_perl .) at ./enc.pl line 3

Compilation failed in require at ./enc.pl line 3.

BEGIN failed--compilation aborted at ./enc.pl line 3.

Can anyone explain this in more detail and/or offer suggestions for a fix?

TIA,

Kurt Miller