I've been trying to connect my 3DS (and Wii U) to the internet. When I connect to the router, everything works fine. My Internet will have full blue bars, and the orange light will flash telling me my friends are online. But when I try to actually go online, it always gives me error codes. For example, trying to get on the eShop gives me error code 007-2100, and trying to use Super Smash Bros. 3DS online gives me error code 001-0803. I don't know if it's a problem with my 3DS, or my router, or what.
I tried using this: http://techforums.nintendo.com/message/115147
but it didn't seem to work for me. My PC's IP address has three digits in the last part of the address, so I'm not sure if I'm doing Step 9 correctly.