iWork refuses to save my documents!
I just installed iWork '09 from an original disk. When I finished a very important project report that took me more than 5 hours to complete (in the affected session alone) and tried to save it, I was informed that I was using a trial version of iWork. When I was asked to provide a product activation code and entered the code on the box, it was not accepted, and when I clicked on the "Go Back" button, Pages automatically quit, rendering my 5 hours of work completely and utterly useless! Why is this happening, and what can I do to solve this problem? Any answer would be much appreciated.
MacBook, Mac OS X (10.6.8), MacBook White, Mid-2010 model