Even a fake key won't matter or make a difference - when you open it up it will ask you to register - do that and put in your Key, then your Authenication Key which they have sent you when you brought it according you your name.
Then it will work.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.