What does it mean "can't get simulating" LTSpice simulation don't work, or simulation is not like you want?
I am not sure what you would like to get, but in your circuit you should connect any resistor between Vout and GND - it could be very high - 10^12 or more, to allow LTSpice to calculate anything, and then see what happened.
From the first point of view I am not sure if there is diode present in FQT3P20 model, to you could see that transistor could be wrong polarised. I am not sure if you should connect S to Vout not Vpmos