Use codeigniter (PHP) to set cron jobs in Windows server 2008

I am using Codeigniter for my website. I need to use windows task scheduler ( windows server 2008) to run codeigniter controller function. In task scheduler i set Program script: "C:php\php.exe " and arguements: -f C:cron\schedule.php. but it is not working . my controller name and its function : localhost/cron/schedule/report.