Have a license but fails to read license

I just downloaded cubase and I have the license. I paste it into the key when is asks me for it and it says its loading in the key. When its finished it closes and then when I go to open cubase it still asks me for the key??? Help???

Hi and welcome,

Are you’re it asks for the key? Isn’t it asking for a registration, please? Could you attach a screenshot of the message, please?