I have just received my new Yubikey NEO, and I am trying to follow the
instructions to use it with my Password Safe existing database, but in the Yubikey Personalization Tool, at the "Settings" page there is no "Save" button, instead there is an "Update Settings..." button, and if I clic on this last button the Yubikey Personalization Tool shows another page with an "Update" button and if I press this last button it appears a red warning saying "X YubiKey could not be configured. Perhaps protected with configuration protection access code?", whatever Configuration Slot I select I always get that message. If I go to the "Challenge-Response" page and then I clic the "HMAC SHA1" button then another page is shown and it is indicated "YubiKey(s) unprotected - Keep it that way".
What should I do to follow the instructions for the Password Safe software?