RSS Feed (showing page cannot be displayed)

I just loaded WP and created a post. When I click the link at the bottom side panel – RSS, I get a page not displayed.

This is the address link displayed:
feed:http://my-northstar.com/blog/wordpress/feed/

URL: http://www.my-northstar.com/blog/wordpress

What Iam looking for is the display of XML code and also be able to create links for the feed.

I have changed several themes, I also took the same version and theme and loaded it to another host and it worked just fine. The hosting company that I am working with is POWWEB.

I also looked at the Permalinks.

When I called the hosting company, they send me back to WP.

I haven’t made any changes from on hosting company to the other.

Could it be in WP or at the hosting company?