enter data into Javascript based site with a windows form and retrieve information?

I want to enter a few details into a website (http://ift.tt/1KoR4HZ) and just press the start server button. I tried using webBrowser1.Navigate("website");

After I enter the details it and press start server it just says "[{"#text_reply":{"action":"replace","attrs":{"innerHTML":"Missing input."}}}]"

I posted a thread on the msdn forum as well http://ift.tt/1NpZYta and there is some other information on it as well.

please if someone could help me with this, I will much appreciate it.