Need help with Exclude/Flatten

[freemx]

I have just begun using ariport to desing an airport and some scenery around
it, and am doing fine, except for one area. I originally wanted to design in
FS2000 but can't figure out how to flatten the terrain, therefore, my runway
looks like it floating in one area and buried in another. I have experimented,
but when I compile, airport says that there has been an error in creating the
exclude bgl file. I settled for designing in fs98, although my problem there is
that I do not like the way that the runway that I am designing scenery for
looks, and I can't get rid of it. I guess I could just move everything to
another location, but I would be more interested in learning in learning how to
fix this problem. The airport area that I am working with is in Ecuador, South
America. If you or someone you know would be interested in my finished product,
I will be uploading it as soon as it is complete. Any help that anyone can
provide will be appreciated. In the meantime, I will just keep experimenting.

[freemx]

I have just begun using ariport to design an airport and some scenery around
it, and am doing fine, except for one area. I originally wanted to design in
FS2000 but can't figure out how to flatten the terrain, therefore, my runway
looks like it is floating in one area and buried in another. I have
experimented,but when I compile, airport says that there has been an error in
creating theexclude bgl file. I settled for designing in fs98, although my
problem there is that I do not like the way that the runway that I am designing
scenery for looks, and I can't get rid of it. I've tried excluding, but it just
doesn't work. I guess I could just move everything to another location, but I
would be more interested in learning how to fix this problem. The airport area
that I am working with is in Ecuador, South America. If you or someone you know
would be interested in my finished project,I will be uploading it as soon as it
is complete. It is coming along quite well, I just need to know how to flatten
the terrain and/or exclude default scenery without getting an error or problem
with exclusion file or bad file format messages after I compile. Any help that
anyone can provide will be appreciated. In the meantime, I will just keep
experimenting.