Hi. I'm trying to make a new account, I got the activation email, but when I click on the link they send me to...

"Welcome, Knight!

Knight Online World wants to help you strengthen the security of your account. Please choose and answer three different security questions. You will be required to provide answers to these questions in order to change your password and email address, or access your account information.
Then they ask me to put the seal/unseal pass and three questions. I do so, but then...

"Invalid Account ID or Activation Key

There was a problem updating your account. Please log in to the website to try again."

tried the same process about 3 times. Help please.