I finally got contact with the USB cable...
Reinstalled everything again, and then it worked....
Now, how could I make this things talk via ethernet?
What I want to to is control several led`s on 4 different channels (pins), and 6 DC motors via a motor shield.
It would be very nice to have feedback from a gyro that will be connected to the Mega shield as well....
And, all this should be controlled via a laptop and a joystick...
As mentioned earlier, this is not a "help line" for Scada, but I think that many will use Scada if we know how to use it...
You can actually do "everything" via Scada....weather station, RC vehicles, home automation etc...etc....
Do you think that you, with your knowledge of Arduino, and programming could help us a bit? 
I cant see in the lines (or logic) uploaded to my Mega, how you can "pick" the right pin, and how to set it up in Scada....
It is not the same as all the other Arduino stuff....
Or am I totally out on the field here???
Rob