No Digest Emails

Hi, I have installed this plugin and love it. My test users love it and have told me it should answer exactly what they’re looking for.

My problem is this: when the user selects “All Email” everything works fine. They get an instant e-mail once something is posted to the group. When they select “Daily” however, no e-mail goes out. The digest test (/?sum=1) shows that there’s nothing queued to go out either (just a page with the lines “Daily Digest:” and “Weekly Digest:” but no data).

Is there something I need to setup to make sure the digests are working properly? Can you tell me where I might look to see if the digest e-mail was attempted but didn’t go out because the queue appeared empty?

I can’t find what I may have missed in getting it all setup!

Thanks.

http://wordpress.org/plugins/buddypress-group-email-subscription/