Haesslich, I had tried everything you mentioned except restarting my computer. I had ejected the Reader from the Library/Store, restarted the Library/Store, relogged in but nothing worked.
And the firmware was updated several days ago.
Originally Posted by Juliette
It happened to me too when I tried to register the 600. Apparently they didn't fix the glitch... The best way to proceed is to go under "My Account" in EBL and then go a bit down, where you'll find the link for the devices.
This worked for me.