Thanks for replying so soon "F". Do you "uncheck" your scenery files in FSNAVDC before entering "create database"? IF I don't uncheck them, then I lose my taxiways,etc... after running it..
I check all my required files in the FS 2004 Flight Sim Scenery Library.
Close the Sim down.
Run the Nav Data Base, where all my scenes are already checked for me.
Restart the Sim.
The FS Nav only displays the Default Airport/Airfield layouts.
F....G-BPLF... 8-)...!
My add-on, complex scenery for Santa Barbara Cal. only shows the default runways, taxiways, objects, etc, in FS Nav.
Only the scenery designed by myself using AFCAD, Abacus EZ Scenery, Runway Generator, etc, is displayed in FS Nav...not other folks scenery which I download!...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.