FSX Gauge does not load

No, he uses a PC only. It is a brand new Alienware gaming laptop. I know the ADS was created by Microsoft because if the Mac Os, but would it be possible that FSX uses this for another usage? (like I did with my demonstrator described above)

To be honest, I don't think so, but I am so desperate in finding an explanation that I explore every options...
I'm sorry, I forgot to answer your 2nd question. I don't know how it works with other aircraft. I think the MD-90 is the only non-FSX aircraft that was tested, and yesterday I only had the FSX aircraft to test because of the clean install.