Same here, i can´t make it work, i´m on a New 3ds 9.0.0-20 U
Reply again i do this and work for me.
First extract the starter kit to the root of your SD (the 3ds file and the boot) Follow this video then start youtube and if it work youtube ask for your firmware version (u can get it in the 3ds configuration), well if this not work for you try the solution down here :3
SOLUTION= Just erase your connection in 3DS internet settings, turn off your modem and then turn it on, then create a new connection (in 3DS internet settings) try if the 3ds (new or old) can connect to it and then change the primary DNS address to 107.211.140.065, save the settings, exit system settings, then go to youtube and follow the onscreen instructions.
PD: sorry for my bad english ^^
PD2 And Edit: Please someone tell me how can i spoiler the video :C i don´t want to see it using all the right post screen.











