Auto message is not sending user-level messages

Hi, I installed auto message into multisite and activated the plugin on the main blog. I set up 2 user-level messages, one to send immediately (upon create new user) and the other after 1 day.

I've registered for a new account, confirmed the registration and received my new user confirmation from the site, but no automessage mail was sent.

It looks like there's a debug mode for this plugin, but nowhere in the admin dashboard to turn it on.

Am I missing something?