You created an administration at our website but you didn’t receive a mail to request a password.

First check the SPAM folder of your mail provider. Because the mail contains an Internet link it is possible that the mail ended up in the spam box for security reasons.
Some mail providers capture the mail before it reaches your mailbox. Then you will not receive the mail at all. GMX is an example of this. In that case, you can use a different email address when you create an online administration at our website. With an email address like Yahoo, Gmail or Hotmail, you will get the mail with the link you can use to request you password.