it does sound like u mite need to connect ur controller by pressing the red button near the battery s
there have been lots of people with freezing issues , i happend alot to me for the 1st month or so , i emailed nintendo , they said it could be a hardware problem , however it has not happened for a while now and apparently the last firmware update supposedly addressed some freezing issues , not sure if it was just internet related freezing though ,
i would make sure that your wii/sensor bar are kept cool and well ventilated .
the wii should automatically update when u connect to the net if u havent allready , that could help .
Ninty will replace it if prob persists though