Cannot get test reminder email to send?

Has anyone else had issues getting a reminder email to fire (at least the test...)?

I have a simple reminder. 'Remind 0 days before [Expiration Date].' (Also have reminders for 30 days before and 60)

I set one of my records expiration dates to today, and click 'Send Test Email'.

Nothing. Anyone know why not? I'd like to see a test email and not have to wait until the next item expires.

------------------------------
Mike Tamoush
------------------------------