Carousels from Custom Post Types

Hey All -

On my site, I've created a custom post type for property listings, which has a field to upload an image called `listingPost`, as well as a field for an additional image gallery. I've also created collection templates (`listing.conf`, `listing.item`, `listing.list`), and have added at least one custom post to the system.

Additionally, I've added `listingPost` to `systemCollections` in `template.conf`.

I'm trying to add a carousel of the custom collection's images, but when I insert a carousel and hit "use existing gallery", it says there are no collections in the system.

What gives? Please / thanks! 🙂