Custom Post Types? Custom URLs?

I’ve been trying and trying to redirect specific URLs to my feeds so that I can get a custom post type to have it’s own feed, but it’s not working. All feeds are redirecting back to the main feed. This is absolutely not what I want.

Can you help? Here’s what my settings look like:

Custom URL redirection
Path: /blog/datagrams/feed

→ http://feedpress.me/dfe-datagram

Path: /blog/headlines/feed

→ http://feedpress.me/dfe-headlines

https://ww.wp.xz.cn/plugins/feedpress/