VTP2 Texture not covering autogen & chopper crashes - s...

Has anyone run into a situation where VTP2 textures refuse to cover over a given area of autogen scenery? I am working in an area (Cell grid 204, 131) south of 3BS airport in Midland, Michigan, attempting to place the grounds of the Midland Regional Medical Center over generic city autogen scenery. Even though my 3d items appear, I cannot change the texture of the ground around the hospital and have tried several layer assignments from 4-50. An additional clue is that choppers hit invisible scenery about 4 feet off the deck in the same 'lawn' area of the hospital. I attempted to raise the elevation of the entire area as a trouble-shooting technique and the obstruction raised with it, and the VTP2 scenery still would not show up.Turning off all additional scenery and going back to the same location does not reflect anything even close to the crash sites. Thoughts and suggestions welcome. :-rotorAl