Sorry for the late reply, but here's a picture of my control board. It's connected via the printerport to the computer.
I also verified that the port number 0x378 is correct, my 'old' CNC program runs fine with that port number. I tried several pin setting for the XYZ axis and the spindle but all with no result, no action from the motors and not even an LED that lights up.
At the moment that I tried these all I disconnected the old CNC program by changing it's port number to be sure that there's no interference from it.