1. open the battery cover. Press and release the small red button located below the batteries.
2. The player indicator lights near the bottom of the wii remote's face should all begin flashing.
3. Aim the wii remote at the front of the wii console, then press and release the red button marked " sync " located on the front of the console under the SD memory card flap.
4. Wait until the wii remote connects to the console. When a blue player indicator light shines at the bottom of the wii remote, the connection is confirmed.
I hope that this will help you sync your wii remotes