all you do is go into your wii settings. youll see where it says under the internet option "wii 24 connect" (not sure if thats right verbatim) and then select the option that says "on"
thatll do it
ETA- incase you dont know how to access your settings, youll see where it says "wii" in a circle right by the envelope on the main screen. click that and go into your users settings. from there you should know what to do