Unable to load dynamic library 'C:\PHP\ext\php_saprfc.dll

Hi,

Am trying integrate SAP and PHP to retrieve records from CRM table.

Am using below versions

Apache/2.2.25 (Win32)

PHP/5.3.28

Downloaded saprfc-1.3.3-5.0.3.Win32.zip.

I followed below steps.

        1.copied php_saprfc.dll from the above downloaded zip to my PHP/extn(C:\PHP\ext)

        2.updated php.ini with extension as below

               extension=php_saprfc.dll

        3.downloaded librfc32.zip and copied the librfc32.dll to C:\Windows\System32.

Restarted the server.

Am getting below error.

PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\PHP\ext\php_saprfc.dll' - The specified procedure could not be found.

Can you please help me to resolve this.Am i missing anything else.