Hi TB,
Thanks for your reply.
I understand your update so I've tried another approach which is to set up two schedules, one for each of the two classes that we have. I know from the shortcode that the class IDs are 215 and 216, but when I set class_cat="215", no classes appear in the schedule. If I set class_cat="216" however, things work just fine.
Any idea of what might be wrong?
Thanks again,
Tim.