The only thing you can do: contact the company that sold you the license code. That's not CNET.
Kees
I've just purchased a licence code for PPT2DVD and i can't register.
There is an error showing that the email and code are not correct. A few months ago I purchased the licence for PPT2Video and that worked fine!
Can someone please help me? I don't want to buy it again!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic