1 Year student license not valid?

Hi.  My college has a 1 year license for the design class that I am taking with it's own registration code, etc.  But when I install it with the code it only gave me 30 days trail usage.  How can I change that so I can have one full year usage?  I was told not to include any elements with "Electrical" in it.  So I unchecked all of them with that word in it.  Still no luck.  Thank you.
Edu