I have problem with my nunchuck when I play Wii Sport's Boxing. When I move my nunchuck up to my face, I won't be able to shield myself from the punches. My left hand (yes, nunchuck on my left hand) in the game is always still ... except that it can move left, right, forward and backward, but not up and down! What should I do? Help D: Is it technical problems or just hiccups (like dust or something)?