UBB.threads PHP Forum Software Community Forums UBB.threads Installation and Upgrade Support Changed server name - now get error

After installing and testing ubb we changed the server name and IP address to get it into production but now I get
Fatal error: Call to undefined function mysql_connect() in D:\Inetpub\wwwroot\ubb\libs\mysql.inc.php on line 44.
So I manually put entries into Database_Server Database_User and Database_Password but still get the error. MySQL service loads fine and the 'ubbthreads' database I previously created is there. Thanks.