Inserting page numbers in Word is not working

I am following the instructions to "Add or remove page numbers", but in doing so all that appears in my footer is {PAGE } rather than the actual page number. I have chosen the "Position", the "Alignment", and the box that says "Show number on first page". I also clicked on "Format" and chose "Start at 1".

I know this is something really simple, I must be missing something.

Thank you in advance for your assistance.