Cron Job set up

I am using the WP Gopiplus Emailer. I want to send post notifications as a cron job, so I don’t break my 200 per hour limit.

The plugin gives me a cron URL

I go into (Panel > ‘Goodies’ > ‘Cron Jobs’), but I don’t how to set the full path. I need help.

wget -q -O /dev/null http://… doesn’t seem to work