Did the DL code included with the drive actually HAVE an activation key, or was it sent via email? Did you check your email for an activation key, including the junk folder? If no key was sent and/or the one listed does not work, try entering it again. If it still doesn't work, try contacting Ubi about it. Be prepared to send them anything confirming purchase and DL code. Whatever you do, don't get pissed and give up. I've read people say sometimes they get a better deal out of it when cyber-clerical mistakes happen.