I recently got my Case 1840 Skid Steer hung up in the mud. The back is buried down pretty far. Basically, the front end is pointed at the sky. It ran fine originally when I was trying to get it out. However, I had to shut it down and call for help. It sat for a few days in this position. Then I went to hook it up to my truck and am having another problem. When I put the safety bar down to operate the vehicle, it kills the engine immediately. Does anyone know what my problem can be?