lighttpd + php + external mssql server

[Graeme Dargie]

I am just looking for some advice or hints if anyone has a clue how to make a FreeBSD server running lighttpd + php5 connect to an instance of MS SQL 2008 R2.

I have already installed php-extensions for mssql but when I try and run a connection from the FreeBSD server it gives a http 500
The error log has this
2012-03-02 18:20:09: (mod_fastcgi.c.2699) FastCGI-stderr: PHP Fatal error:  Call to undefined function mssql_connect() in /usr/local/www/data/

Php -m shows mssql as installed.

Regards

Graeme Dargie