I don't even have a clue what this library you're talking about is. I will do some research on it. I also have a book on writing code for these. I have not really looked at it due to be tied up with other things. I guess I know what I'm doing tomorrow.
What do you mean you don't know what that library is. You included it in your code! Keyboard.hI was going to post a link to the doc for that library but for some reason the ref section of this site is giving me a 403 error. Google "Arduino keyboard" and it will be the very first hit.