I brought my tractor outside this morning to wash it and when I went to get off of it the engine quit like it sometimes will do if the PTO levers are pulled back (safety switch). Only this time the Pto levers were in the correct position and now it won't start. I can here something click when I get on and off the seat (another safety switch engaging/disengaging) but it won't even roll over. Battery is good. Any ideas?