I recently had a similar problem with the SpinTrak - Andy helpfully sent me the connector with another order, but even so, the wiring didn't match the MiniPac inputs.
Much like mlalena, I had to rewire the SpinTrak, but the power wires were the opposite way around to his diagram, so the wiring seems to be a bit inconsistent on these!
For what it's worth, on my MiniPac at least, the wiring diagram shown on the Ultimarc site is wrong - the power connections for the spinner are the same as for the trackball (pins 2 and 3, not 1 and 4 as shown in the diagram)
It took a bit of fiddling, but I've now got a SpinTrak and a U-Trak trackball hooked up to the MiniPac and working fine. This was after several frustrating issues of the Trackball Y-axis being the wrong way round, the Spinner not working at all, or only moving slowly left ... but with the right wiring, all was well.
Good luck with yours!