Paste-toolbars and image doesn't work

Hi!
I've installed the CK editor 3. The editor works when posting content, it can make text bold, italic, colorize and all that stuff. But when it comes to inserting an image, pasting text or so - nothing works. I don't have the same issues on the demo at ckeditor.com, so it's not my browser.

It seams as if it is only when the editor wants to open anything else than the editor itself, that there is trouble.??

I will be happy to specify on any topic, if that brings me closer to a solution

Can anyone help?

Thanks
Mads