i am unable to install suitecrm through my IIS webserver windows 8.1

Hi Team,
I have installed the IIS web sever but unable to installed the suite CRM, i am a newbie here on software part installation.

I have copied the suitecrm c:\inetpub\wwwroot\suitcrm but when i do myhostname/suitecrm/install.php though chrome it only shows the script

please help.

Thanks in advance.

Have you installed PHP in IIS?