Some poeople have bought keys from sources thinking they were legit but have turned out to be stolen keys, some have genuinely got some issue with their system that causes a problem, some have had keys blacklisted because they have let other people use them. however there is nothing we can do except advise you to contact SlySoft directly.
If you had taken the time to read the sticky at the top of this forum (http://club.cdfreaks.com/showthread.php?t=203017) you would already know this
I was not having a go at you in my first post (or this one either) I am simply advising you at the start (before someone starts accusing you of stealing a key) that the only people who can issue you with a new key if necessary is SlySoft.
I am surprised that nobody contacted you, which makes me think your key may have been blacklisted or possibly your email has been overlooked, I hope you get your problem sorted out ASAP as CloneDVD2/AnyDVD are essential once you get used to having them.