Error: unknown error when signing into subscription

i recently took over an unused license that i had purchased for my friend, he has since then got his own with his company, i decided to change the email on the account and install the CorelDRAW X7 on mine, now i read somewhere that maybe because i changed the email it may give me the error. How can this be fixed!? can't call in support because i got it in December 2014 but i only installed it now! windows update is working, i changed the settings in internet options....all is done, I WANT MY COREL TO WORK!!!!!