[SQL functions not working?]

I am trying to get PHP to talk to MSSQL on a Windows 2003 server. I have this simple code on a page:

 

<?PHP

 

$link = mssql_connect('xxxxx', 'xx', 'xxxxx');

mssql_select_db('xxxxx', $link);

 

?>

 

and I am getting this error when I run the page.

 

Fatal error: Call to undefined function mssql_connect() in .php on line 3

 

I also tried this code to see if the functions are on:

 

<?

 

if (function_exists('mssql_fetch_row')) {

echo "MSSQL functions are available.<br />\n";

} else {

echo "MSSQL functions are not available.<br />\n";

}

 

?>

 

 

and that returns "MSSQL functions are not available".

 

I have made sure that the MSSQL extension is enabled by adding extension=php_mssql.dll to php.ini. I also copied the ntwdblib.dll file into the \winnt\system32 directory. I have also rebooted numerous times.

 

Here is all the info about my setup:

 

Windows 2003 Server

MS SQL Server 2005

PHP 5.2.5

IIS 6.0

 

Any help on this would be great. I am very new to PHP and it is driving me crazy.

 

Thanks in advance.