Rich12345, did you manually install the airports or were they installed using an installer? Have you tried to activate the scenery?
I don't know the scenery package in question, but I have installed FS2002 airports into FS9 and sometimes they go into the sceneryDB folder, which FS9 doesn't have and so the installer creates one.
I would be tempted to uninstall and then reinstall into the addon scenery folder as BFU and activate it. That way if it doesn't work in FS9 it is easy to get rid of.