I'm a wee bit confused mate... do you mean you can't get to the programming stage Arnaud mentions, or you get there and it doesn't work?
Did you buy the Rover cable with the unit? If so, on mine one of the SWC wires from the Erisin is hanging loose as a fly lead, and the other is already grounded - so I think you would have to leave one of yours in the Rover loom, and take the other to that fly lead.
Not sure which one of course, I suppose suck it and see