note 38941 added to ref.vpopmail

I am having trouble using these functions, I am running Apache2.0 with PHP 4.3.4 I also did a ./configure --with-apxs=/path/to/apache --with-mysql=/path --with-vpopmail=/usr/local/vpopmail When I wrote this very simple page I get the following error Fatal error: Call to undefined function: vpopmail_add_user() in /var/www/add.php on line 16 Why cant PHP find the vpopmail funtions? Am I missing somthing here? ---- Manual Page -- http://www.php.net/manual/en/ref.vpopmail.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+38941 Delete -- http://master.php.net/manage/user-notes.php?action=delete+38941&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+38941&report=yes Search -- http://master.php.net/manage/user-notes.php