The DBD::pg package is the one currently maintained, however, the binary of it is compiled by pgfoundary and is compiled in a way where the DLL’s are incompatible when I used our version of ActiveState Perl on windows 2008 x64. Therefore, I found another third party repository and used theirs:

1. On the command line, run: ppm rep add trouchelle.com http://trouchelle.com/ppm/
2. Then start the package manager by running: ppm
3. View all packages, find DBD_Pg and install it.
4. If you are on a 64 bit OS, it will require krb5_32.dll on the system which is the Kerberos DLL from MIT. You can get this by installing the 32 bit version of PgAdmin III, it’s in its install directory.

Can't load 'C:/Perl/site/lib/auto/DBD/Pg/Pg.dll' for module DBD::Pg: load_file:The specified module could not be found

(or similar). This was reported as a bug on the project site:

http://pgfoundry.org/tracker/index.php?func=detail&aid=1010467&group_id=1000199&atid=754

The solution described there worked for me:

copy pg.dll.manifest to the dir of perl.exe, then rename it to perl.exe.manifest

Also see this forum thread:

http://pgfoundry.org/forum/forum.php?thread_id=1145&forum_id=739