I will take a couple of guesses here. The signature of the bike is on the USB stick correct? What format is the USB stick in? It should be Fat32. I know the bike is very particular on the type of USB drive. You may want to try a 8 GB. You should also receive a USB stick from Yamaha. Mine was mailed to me. I believe the activation code is good, it is the type or format of the USB drive that is causing the problem.