I believe I have this application installed and operational on one of my systems. I will examine its configuration once I have access to the machine, in about 8 hours.
Meanwhile, take the time to confirm:
If you are using Unix sockets rather than TCP loopback, ensure your socket file resides within the /var/www chroot. (I use TCP loopback, so I don't have this concern.)
Be sure these exist:
/var/www/conf/php5/pgsql.ini
/var/www/htdocs/phpPgAdmin
/var/www/tmp
Review the contents of pgsql.ini, also.