I did almost everything all of you suggested.

Still nothing works; the display is just not showing anything.

I even tried to reverse the bus order (sorry Melanie) since the guy from EA said this would be so (but I can't believe it - D0 on display should be connected to DB0 and so on, for sure).

Ii is now sunday 15:45 local time and I won't be able to have news before tomorrow morning.

So, let's wait a little...