Try to find the website for your type of router. The website for my router has numbers, such as:184.108.40.206. On the website, you can change your security type for your connection, and make passwords as well. Maybe your neighbors are using your connection if it's open?
Hi guys, me again
I tested the game in my sister house with her Wii and its own Wi Fi connection, and the game still has the same problem...
I wonder if there's a regional server problem. There's nothing wrong with my Wii it seems.