Instructions
Make sure that the Wii sensor bar is plugged firmly into the back of the Wii. If the sensor bar is loose, the Wiimote will not respond correctly.
Insert new AA batteries into the Wiimote if it has been a long time since you replaced them. Dying batteries will cause the Wiimote to be unresponsive.
Ensure that you are between three and 10 feet from the TV when using the Wiimote as that is the recommended distance listed by Nintendo.
Remove any objects that may be blocking the Wii sensor bar or Wiimote from sending or receiving a signal.
Move or turn off cell phones and radios near the Wii system or Wiimote. These give off radio frequencies that can cause the Wiimote to go haywire.