For those who have difficulty with English, and for those who are struggling to do the trick works quite short, here's how:
1. / Verifier sense of batteries in the remote and the receiver THEN remove the plastic that eventually the guards. FYI, I had forgotten to remove the plastic battery A and I struggled to make the contraption works ...
2. On / Off your APN (Important!)
3 / Plug the cord on the remote socket (GPS for me on my D90)
4. / on the receiver and make sure the red and blue lights turn on the receiver when you press the remote control. Otherwise, verify that the white pins 1,2,3,4 are set identically.
5. / Turn your camera
6. / Staying single trigger position, do not get in remote control!
7. / DO NOT PUT IN AUTO FOCUS !!! I do not know if this is a bug in my house but I have to put myself in the manual in order to trigger !!!
I hope I helped :)