Bought 2 of these in conjunction with Tiger Woods 11 and they don't work. I have looked up everything I could find to identify the problem including turning off phones, turning off wireless keyboards and mouse, checking for other IR sources that might be interfering, adjusting sensitivity etc etc and can only conclude that the devices themselves are faulty. The numchucks work with all other games and in fact work with tiger woods 11 on the basic swing mode. Very dissappointing. Am returning for a refund.