Software Firewalls Identified as Being "Incompatible" with the Nintendo Wi-Fi USB Connector

Zone Alarm Internet Security Suit
Important Note: In order to use the Nintendo Wi-Fi USB Connector,
Zone Alarm Internet Security Suit must be completely uninstalled from your computer.
Simply disabling (turning off) this program will still not allow a successful connection.

米国公式ではZone AlarmはNintendo Wi-Fi USB Connectorト互換性が無いから
アンインストールして他のソフトを使えと言ってる。