When you cycle the gear to the up or down position are you getting a gear light indication. If you are getting a light but your handle is not returning to neutral it is the switch on the power pack. If your not getting a gear light indication it's probably a gear switch. When I visually inspected the switch on my hydraulic power pack it looked fine but after I took it off it was clearly cracked. A temporary fix I used was to just spray it with contact cleaner. Gently tapping the power pack with the toe of my boot worked too.