Do you already have (like Unlaunch or Twilight Menu++) installed on your DSi? What region is your DSi console from?
: Unlike standard DS games, which only support outdated WEP security, White 2 can connect to modern wireless routers with WPA/WPA2 encryption when played on a DSi or 3DS. Camera Integration Xtransceiver
If you are going through the trouble of installing Pokémon White 2, why specifically hunt for the version?
The Ultimate Guide to Pokémon White Version 2: DSi-Enhanced Features and Installation