In addition to DoomMeister's comment; Go to "System Settings", "Hardware Monitor", then make sure, J1 isn't Sticking, Sluggish, or not going all the way down, when you pull back on the "Left Stick" if your in "Mode 2", OR "Right Stick" if your in "Mode 1". Check J2, J3, and J4 as well. You can Test every Button, Switch, Slider, and Stick on your ST16 as well.