Tracey,
That pack contains voices, registrations and styles, but you won't be able to view all 3 types at the same time.
To see styles set the KB to Style mode first by pressing Style, or touch the style area on the Home screen, then navigate to Expansion and the Christmas folder.
To see registrations press the registration plus and minus buttons simultaneously (or touch Regist at top left of the Home screen) before going to Expansion and the pack folder.
To see voices touch one of the voices on the Home screen and go to Expansion and the pack folder.
Try loading one of the registration banks and push its buttons to hear if the pack plays as you would expect.
Hopefully it is only a question of being in the right modes rather than an incomplete installation.
John