Connection Error Detected

I recently bougt a Kobo Aura ed.2 and still haven´t got it to work, I am now starting to give up after two days of troubleshooting, downloading older versions of ADE and more...

Both my computer and Kobo are authorized with my Adobe account and everything seems to be in order.

BUT, when transfering ebook from library or anyother place I get this message:

"Connection Error Detected

Digital editions could not connect to the fulfillment server.

Please make sure you are connected to the internet."

What to do, can anyone please help me?

//Joakim