Events Won't Publish after Update

I have added Events+ to manage some classes our school offers after school. We want people to send their kids in with checks or pay through our online tuition system.

I got everything set up and started adding events but it won't let me publish them. I likely have something set wrong, but a little help would be great, I've got a ton of classes to key in and 2 hours into it, nothing to show for it!

Thanks -