Strange Joystick Behavior

I decided to try FSX on a system that hasn't been used for a few months and the CH Flight Sim Yoke and Rudder Pedals are acting very strange. As I move the rudder pedals, the throttle is moving in and out and the yoke wheel in the virtual view is turning. The toe brakes seem to controlling the turning of the yoke wheel. The throttle keeps speeding up and down as it is advanced, and the yoke itself is unresponsive.

I have tried recalibrating which shows things are normal, and restarted FSX. Settings on the Controls menu seem fine also. Nothing seems to help. Any ideas what could have caused this? The yoke and pedals work fine on another computer with FSX. Thanks, Tom