Problem with promotional membership emails

We are trying to set up promotional memberships. We'd like Dolphin to send emails to promotional members once a day until their membership expires after 3 days.

The problem is, the site isn't sending out the daily reminder emails.

On the Manage Membership Levels admin panel, we have unchecked the "Notify members about membership expiration only once" box, entered "3" for number of days before membership expires, checked the box for "Enable promotional membership", and entered "3" for "number of days for promotional membership."

The promotional memberships do expire, but we can't get the emails going.

I've double checked the cron job that fires the periodic.php file, and it is firing every minute (* * * * *) and calling: cd /home/brenaris/public_html/baystater.com/periodic; /usr/local/bin/php -q cron.php

Those paths are correct, and the cron job isn't giving us any errors.

Please let us know what we're doing wrong, thanks!

-- Jason and Val