Welcome to the forum.
On a side note, the company I used to work for in the USA had a plant in Luxembourg.
You say you have a serial number. Have you registered that serial number on the SW sight?
It sounds like it is not recognizing the serial number. Are you trying to download from the
SW site or some where else? When you received the serial number did they confirm that
the numbers were valid and registered?
Take a look at this link ans see if it helps you at all.