Auto-run flexget on startup

I'm trying to get flexget to automatically execute. I currently have an ASUS RT-N66U with Tomato Shibby installed, and entware-ng installed on a USB stick. After a great deal of effort, I have a working config.yml file for flexget and placed in the same directory as flexget, (that is /opt/bin). I'm able to execute it by changing directories to /opt/bin following by:

flexget execute

I've followed the instruction for scheduling on the OpenWRT page and edited my crontab file to check...

Auto-run flexget on startup