Connecting Problems Prusa i3 with Sanguinololu (no replies)

Hi All,
I am new on the 3D Printer scene and have the following problems, (until now, that is...:-) )+

building a Prusa i3 with Sanguinololu with Cura I can not find the Sanguinololu board listed in Arduino. I think that's why I cannot connect my printer to my laptop. I know that Sanguino software should be installed onto Arduino, but I cannot fix it.
The machine is mechanically OK., the Sanguinololu board is soldered and seems OK.
When I connect to my laptop, (com6) it is detected, the led is on and the USB sound is also there, so it connects,
But, when in Arduino, going through the set-up mode, the program tries to connect, "connecting", but after a few second there is this message:
"Machine State: Closed."
When I press the reset button on the Sanguinololu board, the stepper motors are rattling a few seconds, so there is something going on.
That is how it is at the moment, who can help me out there???
How can I get my computer and Cura to recognise my printer and what am I doing wrong?
As I am more a mechanic than a computer specialist, plaese keep it simple and step by step.
Thanks.
Peter J.