Why cant i make an account on teen nick HELP 10points.?

I'm sorry. I'm not really sure. I tried the same thing. It would not except mine either. Normally it tells you why it doesn't except it. I had the characters correctly as well; I KNOW I did. Just don't feel bad. Your not the only one. I would suggest going to the-n.com for Noggin. But when I did it kept sending me back to Teen Nick. Sorry wish I could help you...