From the Wii Menu, use the Wii Remote to select the "Wii" button.
Select "Wii Settings" to access the "Wii System Settings" menu.
Using the arrow on the right side of the screen, move over to the second page and select "Internet."
Select "Connection Settings."
Select the connection file you wish to edit and then select "Change Settings."
Using the arrow on the right side of the screen, move over to the second page.
Select the type of wireless security used by your wireless network.
Select the white box that appears and then use the onscreen keyboard to enter your wireless network's password and select "OK" when complete.
Select "Confirm," then "Save," and "OK" to save the settings and test the connection.