I just created the same sidebar to be sure it works (on my end): http://cl.ly/image/460T3u3n3v2r

If the widgets are saved on the widgets page then the sidebar name should be correct, so that’s not the problem. It does actually show you a sidebar right? It’s not like the page is fullwidth or something? 😉 If you still have this problem, send an email with your WordPress login details to info@redfactory.nl and I’ll take a look. Hopefully I can quickly solve this for both of you 🙂