I'm in the ladder already, but I am bored of my Wizard.
So I created a new char, a monk, and didn't even start a game.
Then when I tried to add him to the ladder it says "no new chars found, you're already in".
I figured, "ok, maybe i need to enter a game first".
So I started a new game with my monk, but didn't even go to town, didn't even kill a zombie.
Still couldn't add him to the ladder.
diablo3ladders.com sees the monk (he's named Ladder and is the last in the list), but it won't add him to the ladder.