first i want to say thanks to everyone that welcomed me.

I have a 07 737 z trak and my pto clutch will not come on. I am getting voltage to the pigtail but it wont turn on. tried new pto switch no luck. I can take the old pto and put 12 volts to it and it clicks. the new one on the motor wont even do that. i have jumpered my seat safety switch. this just happened one day---- we mowed put it up 4 days later got it out to mow again fired up pulled PTO switch. nothing happened! am i missing something???? any advice or help would be appreciated.