I am having the same problem. I regsitered an account under "Account" on the website, clicked the activation link I recieved in the mail and was returned to the site where I was prompted to enter what I wanted as password, so I did. But when I try to log in to the game I get "Incorrect password" on one of the servers and "No account with that name" on the other server.

When I click the "Resend verifaction" link I get that "This account doesnt exist, or is already activated" and when I try the "Forgot my password" link I recieve a mail and I can click the link and change my password but I still cant log in to the game.