I finally received my card APM2;) It was pretty fast, because I chose not mounted version.
But, on the Wiki pages there anything that you want on the apM1, but the tutorials APM2 are rare. He remains on the forum, but as English is not my native language is not simple to understand.
For now, I set up my card and plugged into the RC, my motors. This works, but I still have a lot of things to see before my first flight.
On my four engines, only three run continuously. The engine only turns him one when I Trottle the bottom and also Yow. As soon as I drop the sticks of one or the other, the engine 1 stops.
Do you know why?