Instructions
Inspect the sensor bar plug to make sure it is inserted into the appropriate slot on the back of the Wii and that is has not come loose.
Place the sensor bar at the front of the TV or entertainment center top if it has shifted. It is important that you put the bar as close to the front as possible so that the path between the sensor bar and Wii remote is not obscured.
Center the sensor bar on your entertainment center or TV. If you encounter inaccurate Wii remote controls this could be the culprit if the sensor bar is off center.