What this means
Disconnected from the access point during connection testing.
These codes appear when the console loses its connection to the access point during the connection test. Nintendo's DSi manual separately uses 050000–050099 for no access point in range. Move closer to the router and confirm the wireless network is available before checking RexiMemo DNS.
What to try
- Fix the basic Wi-Fi connection first: make sure the access point is visible, in range and compatible with the DSi.
- Check that you are editing the same saved connection the console is actually using and that its security settings are correct.
- Run the DSi connection test. Only troubleshoot RexiMemo DNS after the console can connect to the access point successfully.