Page number on first page

I'm in the process of transferring some files from v3 to v4.
I have a file which is the second movement of a set. I'd like the score to begin with page 7, and that number to appear on the first page of the score. I have set Page settings>>First page number.>>7, and ticked Style>>Header & footer>>Show on first page. (The page numbers are, by choice, in the footer, centered.) Pages 8-10 display correctly, as does the score when opened in v3. What am I missing?