JD 325 joy stick problem

[Papa Roy]

Problem with 2008 JD 325 skid steer rt hand joy stick. Push park button to enable hydraulics. Notice on panes reads rt joy stick not centered. It worked several times after going thru the motions to operate. Any idea how to calibrate the joy stick or may be another problem. The park button is a red snap switch. Don't know if double pole or single. Please advise.