from:http://www.Nintendo.com/consumer/systems/wii/en_na/ts/wiiremote.jsp
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Well, it is either that you need to go into the options and put the sensor bar above or below your tv, if it is on the wrong one, then switch it. Or, try pulling your Wii Sensor Bar in a bit, that's what I did before, and it worked. Hope this helped! :)
If you don't have a sensor bar you cannot aim with the wii remote so you can't control your wii.
1. Try unplugging your will sensor bar 2. See if your Sensor bar is damaged (you can check this by getting your Mobile phone and going to camera the hold it up to the sensor bar you should be able to see 5 lights on each side they should be pink/blue colour) 3. You should be able buy Sensor bar $10-20 at any gaming shop 4. If still not working it may be your wii remote
There is a sensor of some sort inside it that goes to the sensor bar the sensor bar accepts the sensor as commands which allows you to freely move around in games.
try either replacing the batteries on both the remote and the sensor bar or change your grip of the remote.