Problem with rss and categries

Hi,
I have two categries in my blog: “post” and “gallery”.
I need a rss feed for each category.

Using https://www.blogname.com/category/post/feed
I get a rss containinig posts included in the category “Post”. That’s right.

But if I browse https://www.blogname.com/category/gallery/feed
I don’t get a rss with posts belonging to “gallery”. The browser led me to the category page “Gallery” and not to the xml page.

It seems that for the category “gallery” wp doesn’t create the rss feed… and I don’t know why!

Can you help me?!
Thanks