Any game dating back to 2006 seems to not play online, flashcarts included. Mario kart DS, Tetris, and more! I want to play online... Anyway, the games all say the same thing. "No compatible access point in range. Please try again. For help..." On the DSi, it says the same thing, too. on the WFC setup, it says "Unable to connect to an access point. Error 51300." But this is only games from 2006! Sonic colors DS works fine! What could be happening? They worked back in 2009, though. I found the solution. Change your settings to WEP Shared. If you have a 2WIRE modem and it bricks, reinstall the frimware. You were warned.