I have a new MX6000. I was mowing hay and the cruise control kicked in unknown to how I did this. I brought the handle all the way up and the tractor still would not stop. I cut the power to the lowest point and finally got the tractor in neutral. Then I got the PTO cut off I put it in gear again and same problem that the cruise is back on and unable to stop tractor. Again put in neutral and turned off tractor. Now it will not crank. Any suggestions on how to get it to start?