Problem talking to a wireless wii nunchunk

I got a wireless wii nunchunk, and tried to make arduino talking to it. the wireless wii nunchunk comes with wireless adaptor, which has a standard nunchunk connector and a 2.4Ghz tranceiver, the wireless nunchunk has a 2.4Ghz tranceiver paired with the adaptor. I thought as this 2.4Ghz bridge should be transparent to arduino, the wiring code should also work for this device, but unfortunately, it does not. Have anyone work on such device? The analog power pin is not able to drive it?