PHP 5.5.6(wordpress) , sql server 2008 r2 with IIS 7.5 on windows 7

Hello everyone,

I have been struggling through the 5 minute setup of PHP/wordpress with sql server 2008 r2 from last two weeks.
I followed the tutorial & many more source.
Its time to get help, I done the PHP on IIS with mysql but the same thing I am trying with SQL server but could not work..

I changed the PHP.ini by following code
extension=php_mysql.dll
extension=php_mysqli.dll
extension=php_sqlsrv_55_nts.dll
extension=php_pdo_sqlsrv_55_nts.dll
extension=php_pdo.dll
& tried to access localhost- phpinfo()
I am getting the error
HTTP Error 500.0 – Internal Server Error
<path>\php-cgi.exe – The FastCGI process exited unexpectedly

Any type of help would be appreciate, suggest me the change..

Thanks in advance……….