Project 09 (Motorized Pinwheel) problem - motor spins forever

Hi guys.

I'm in the same condition of Pando, I plug the 9v battery and the motor never stop to spin, and I haven't solved the problem changing all the pieces (mosfet, button...) and I have the same code...what I can do to solve?
Thank you in advance..

I tried with the second scheme too, but the result is the same...