Hey I see from your conversation with CPrime that you are having trouble with your router. DSi works with WPA2, but Standard DS Games will not. I suggest you open your web browser on your computer and type 192.168.1.1 into your the URL and press enter. This will bring you to a page which will ask you to log into your router. The password should be admin unless you've changed it. Leave the username blank. You will then be brought to your routers settings and you should be able to change your encryption.