Re: Error Code: 003-2001

Please try to "Power cycle your home network", see below.

If your wireless router or access point is unresponsive, power cycling these devices may resolve your connection issue.

http://en-americas-support.nintendo.com/app/answers/detail/a_id/626

Also, ...

http://www.nintendo.com/consumer/wfc/en_na/ds/results.jsp?error_code=003-2001&system=3DS&locale=en_US

Also, ...

Please try autoconect button "Wi-Fi Protected Setup", on your router and also in your Nintendo console Wi-Fi parameter.

Please look at this logo(s).