Are you absolutely certain you have the right serial number?
Was this a student/academic version?
Where are you reading the serial number from?
I am 100% sure it is the right serial and activation code. It worked perfectly fine the first time I downloaded it. Yes, it is the student/academic version and it was approved with my student ID. The serial number is from the box packet it came in and the activation code was emailed when my academic status was approved.
If you are actually using the serial number that was e-mailed to you after you verified your qualification as a student, and if that serial number is not working, then you will probably have to contact customer support. I was concerned that perhaps you were entering the number on the package. But it sounds like you are not doing that.
I for the life of me cannot figure out how to contact customer support. I've been through so many circles trying to find an email and it keeps directing me here.