first time install on Red Hat Linux - PHPNuke and PHP/Apache 2

Hey folks, I am a first time user of PHP. I've installed in on my Red Hat box with php-4.3.5.RC1 and Apache 2 and 4.0.17-standard., Im trying to implement a When I try to open any of the PHP pages that come with the application.. such as admin.php or any of the base php documents, I get this message... Fatal error: Call to undefined function: message_die() in /etc/httpd-php/htdocs/php/db/db.php on line 88 line 88 of db.php contains this:  message_die(CRITICAL_ERROR, "Could not connect to the database"); I have verified the fact that mysqld is up and running and I am able to connect to it as the user listed in my config.php. All of the proper tables are created for PHPNuke, so the error message doesnt appear to be related to the Mysql database not being available or accessible. Any help or guidance for walking me through a possible troubleshooting session would be quite helpful... thanks Chris