If Wii, then it means that you can't connect to your wireless networked, this happened to me once, let me try to help you.
My wireless connection server changed and I wasn't able to play online, I then looked for the name of the router name and I changed accordingly to the new connection. you need to go to the wii logo at the bottom left of the wii menu, go to settings on the right, then go to page 2 because it is not on page one, go to internet which is 3rd one down on page 2, click connection settings which is the first one up, then there should be connection 1 connection2 and connection 3, choose which ever one nesecary and then choose wireless connection, search for access point, after it says searching, it should say choose the access point you want to connect to, click ok, choose the access point you want to connect to, put in the password or key, press okay once you have doubled comfirmed that it is correct because even the slightest typo there can mess it up, click ok and it will say, do you want to save these settings? click ok and it will say connections settings have been saved, choose okay to start a connection test and should be succesful but Nintendo has ended internet for wii anyways, you can try though! Here is a youtube link to watch how to do it. http://www.youtube.com/watch?v=jWzzlm468z4. Hope I helped! 