All of a sudden, on FS9, the throttle on my new X52 joystick is generating only about 70 percent power - about 1800 rpm on the J3 cub and a touch over 2000 on the C172.  The calibration chart says all's well but, being new to this, I'm in a quandary.  Is there something on the stick or keyboard I could have hit to cause this?