What did you forget your passcode to?
Which Kindle model do you have?
Take a look here: http://www.oberondesign.com/pages/identify-your-kindle-model
You do not need the box -- Take a look at my link and it will show you the different models by picture and you can see which one is yours.
Please try entering this code as the passcode:
The amount was set in the beginning when you setup the question -- I am only a tech on the website.