This error is caused by an error with registering the Wii console with the WiiConnect24 service.


To solve this error :

Try connecting using only one router and one modem.
Try connectining from other location or on another network.
Disable your firewall on your network or check with your Internet Service Provider as something may be blocking your connection.
Disable your anti virus software.
Contact Nintendo as 1-800-255-3700 for more assistance.