16x2 LDC Display with keypad shield

I want to use my Arduino and LDC display to have multiple "pages, and each time I click the right button, it goes to the next page, but when I run my code, it goes to the first page, the doesn’t go to the second. Please help as soon as possible, here is my code so far in the attached file.

CODE.txt (14.3 KB)

Cross posted with answers already. http://forum.arduino.cc/index.php?topic=502847.0

OP. Please, one thread per topic. It wastes people time when they end up giving an answer on one thread that you already got on another.