DS Browser Password Locked

Hi, I just bought a browser from Ebay for my DS lite, The seller said it was new! When I fitted it the Browser and memory expansion pack it comes with I find the browser has a password on it.:(

So can't use. Does any one know how to reset to factory settings so i can enter new password?

:p

Hold L, R, Up, X, B, and Select while it is booting, you'll be able to set it to factory default.