Fatal error: Call to undefined function mssql_connect()

Got error messsage Fatal error: Call to undefined function mssql_connect() in C:\AppServ\www .. when perform PHP use MsSQL server 2005, and Appsrv. Whereas below code at php.in already unremark
extension=php_mssql.dll
;extension=php_msql.dll
extension=php_mysql.dll
extension=php_mysqli.dll
;extension=php_oci8.dll
and Apache services already restart, PC also.
and below dll files also keep at C:\AppServ\php5\ext:
- php_msql.dll and
- php_mssql.dll

please download ntwdblib.dll at http://webzila.com/?wz=dll#results then restore to folder:
C:\AppServ\Apache2.2\bin then restart the apache services