If your trying to set up a PHP cron job or something like that, another options is to just call your page with lynx..
lynx www.your_domain.com/php/run_this.php
and have that command issued every so many minutes, hours, or whatever. Just make sure your script doesn't return anything.
The CGI mode is probably better, but this might give you an option till you get the other going...
---John Holmes...