REFUSED PERMISSION TO USE ADOBE ACROBAT DC EVEN THOUGH LICENSE FEE FULLY PAID.

I HAVE PAID THE FULL LINCENSE FEE FOR THE ADOBE ACROBAT DC. BUT EVERY TIME WHEN I AM TRYING TO PRINT OR CONVERT DOCUMENTS INTO PDF FILES, THERE IS A MESSAGE PROMPTED SAYING "EDITHER THE LICENSE HAS EXPIRED OR ADOBE NOT ACTIVATED". IN THE CIRCUMSTANCES, I HAVE BOUGHT SOMETHING THAT I AM NOT PERMITTED TO USE. HELP PLEASE.