header image won't show

Hi guys

I really need your help.
I’m very, very new to wordpress. Right now I’m working on a site for a schoolproject.
I have already installed one wp on my server and my teacher helped me to install the new one, which I’m using for the project.

My problem is, that in the new one, the header image won’t show. In my personal one (http://www.nichtnormal.dk) it’s not a problem at all!

I performed the exact same steps on the new one (http://www.nichtnormal.dk/evolving-e) but it doesn’t work. So, I’m thinking it might have something to do with the database, links, what so ever. It’s not the theme’s fault, as it works fine on my first site.

Thank you so much!!