C# Web browser invoke click

I have a web browser that navigates to this url: http://ift.tt/2ngO4K8

I want to automate a search on that by automatically entering text into the textbox then hit the "Søg" button. I do that with this:

        webBrowser1.Document.GetElementById("adresse").InnerText = "hobrovej 35 9000";
        webBrowser1.Document.GetElementById("btn-soeg").InvokeMember("Click");

All that is working fine, the problem is that when the button is clicked, it only shows a loading box and not the actual results

Thanks in advance