My RTV1100 with a V4291 plow has a problem. When I start the engine and go to raise the plow from down to up. I push the up switch and let go the plow travels to the full up position. The same thing happens when going down or when the blades are angled forward to backwards. If I shut the engine off with the plow full up and turn the ignition but not to start the engine you can lower the plow down each time you push the down button. Any ideas.