[Koha] overdue notices

Hey Koha- For some reason our system is not sending out overdue notices to our patrons. Holds and checkins/outs work fine. But no overdue notices have ever been sent or received. As far as I can tell, the settings in "tools" are all correct. Any ideas? CM -- Caitlin McGurk *Librarian The Schulz Library The Center for Cartoon Studies <http://www.cartoonstudies.org> McGurk@cartoonstudies.org*