NDS Friend Code(10 Points)

I don't know how to get the friend code. I want to play Marie Kart in the wifi connetion, but it say i don't have the friend code and it tell me to go to the www.nintendowifi.com to look!!!!!!!!!! And i try to go to the Nintendo WFC Settings and try to clik search for an Access Point to look for my friend in england, but it can't search fore them!! please help, i want to play with them!!!!!!!!! Please don't copy the others !! THX!!!!!!!!