So I connected to the Wifi with my black 2 at a friend's house yesterday but today when I tried to connect at my house it won't work? I tried to connect to my wifi with my DS lite but it said the security settings didn't work with the DS. So I tried on my 3DS instead and my 3DS is fully connected to my wifi and works fine but when I go into Black 2 to do a game sync (for the dream world) and tap on game sync it says "Unable to connect to nintendo Wi-Fi Connection because the Wi-Fi user information from the Nintendo dSi system and the save data do not match" (I'm not even using a DSi so I don't get that...). So I tried to go back to the main menu and go into the WFC settings but it says "Please configure your connection settings under the Internet option in the System Settings" but my wifi works in every other game... Any help? I really want to go on to my dream world account..