I ran my tractor into a snowbank, was going to get off and check it out and shifted it into neutral. Every time I got off the seat, it started to kill, like it wasn't in neutral. Then I got off and let it kill. I checked out and shoveled a couple of minutes, went back into the seat and it wouldn't crank or turn over at all. I got the ignition light and clicks like the glow plugs were working but it wouldn't crank over. No thing would make it crank (and I adjusted and readjusted things for a long time. It seems it won't go into neutral. I towed it back to my house. Now what?