Thread:Project:Support desk/calls to post gres keep failing

Installed: Mediawiki 1.16.0 / PHP 5.3.3 / PostgreSQL 8.4.5

While running the mediawiki install script it keeps failing on pg calls. First it would fail trying to return the server version so I hard coded the version to get around it as I have a test VB application that is able to connect and return the server version on a seperate machine, so I know the connection to the database is good. The wiki is installed on the same machine as the database. After the hard code it now fails trying to call the escape string - Fatal error: call to undefined furntion pg_escape_string in /usr/httpd/htdocs/mediawiki/includes/db/DatabasePostgres.php on line 1389. Any insight as to why it is continaully failing and what I can check to get it to install? Thanks!