Hmm... From what I have found, the higher the sensitivity level, the further away your Sensor Bar can detect your Wiimote. Perhaps you are trying to use it from such a distance that your Sensor Bar is in a possition that has no broken path from the wiimote to the bar. Also, try changing the sensitivity once your Wiimote is detected to prevent this problem.
Hell, this may not be usefull, but you may get lucky and have a simple issue such as that...
Good luck.
31/12/2006
Mario Kart Wii
S.A. = I <3 Antonina =