Hi Umberto, can you please elaborate on what exclusion areas mean?
This is not really the place to discuss scenery design. A problem with them will always result in default objects appearing in a scenery. It's strange that using ADE would cause problems, because I'm sure ADE supports exclusion areas and should correctly write back the one we included in the AFCAD when saved back.
However, since you say you use FS9, there might be differences in how ADE works in FS9 mode, but I'm afraid I cannot be of much help, and nobody at FSDT has FS9 installed anymore, since we stop supporting it in 2011. That's 5 years ago...