Evernote Access Code

[Zeebee 0]

have been using Evernote for a few years now.  In my Windows computer, my Android phone and recently in my Amazon Fire.  I need to input a 4-digit code before I can access my notes and lists etc. and have always had the same access code.  Today when I used my Amazon Fire tablet and clicked on my evernote icon, I tried entering the same 4-digit access code and it won't let me enter.  Tried several times but still no luck.  Used my Android no problem, used my computer no problem.  Help!