Error Code: 51030
Unable to connect to your wireless network
Likely cause: Your wireless router may need to be power cycled, or the connection settings have changed.
How to fix: Power cycle your router; redo the connection settings on the Wii and try again.
Did this connection used to work but has suddenly stopped? "Power cycle" your router and modem. To do this, unplug both the modem and the router from the power outlet. Wait a few minutes, and plug the modem back in. Wait a couple of minutes for the modem to initialize, then plug in the router. Try to connect the Wii online and test for proper response.
Erase your old connection settings on the Wii and set up a new one, as your router's settings may have changed since you last connected.