PAL AND NTSC DON'T MATCH :(
If your disc I set to PAL, but your
video assets are NTSC or vice versa you will never see them as available for motion menus. This is DVD-Specification restriction and you can do nothing about it.

In other words PAL discs cannot have NTSC menus, and NTSC discs cannot have PAL menus.
VERSION: N/A MENUS
SOURCE: Alex Asp