that candle trick is meant for showing off and only works for certain games.
you don't have a wired nunchuk? that could be the problem, especially from a cheap manufacturer. find your old nunchuk.
check for powerful light sources in the room, or if the sensor bar belongs on top or on bottom of the tv, or if you are less than 5 feet or more than 15 ft away from the sensor bar.
failing all that check the 'complete list of wiimote problems' sticky on this board. hope that helps