I've created a view with a block display. The view has a grouping field, and in the views ui preview, the output displays as grouped by that field:

When I display the block using my template, though, it's not printing out the grouping info (Advanced Learning Session or General Session). That field is not a standard one, like title - it's a CCK text field on my content type. How do I access that field in my template? I've tried the solutions shown here to get a list of available fields, but none of them work.