In order to save your configuration, you need to login. You have been logged in as ay688 with the password ay688. If applicable click on the username ay688 in the above-right corner to change the account into an permanent account, otherwise the account will be deleted after one day.
To create Live-CD/DVDs or USB-key images, your first have to use the anonymous account to turn into a permanent one. or you need to with an existing user account..