Umberto, have you had a chance to look at this yet?
To reiterate, I am noticing that when I am at KDFW and haven't activated GSX the VASI's and RWSL work properly, but as soon as I start a GSX function it seems to break those features. If I am arriving at KDFW the VASI and RWSL seem to work fine, but if I start a GSX function after landing then take off again the problem where some of the VASI lights disappear or the RWSL lights get stuck on even when there is no a/c on the said runway. Seems like there is some interaction with GSX that is blocking the VASI and RWSL lights from working properly.
Also, the only things I have running when this happens in the NGX. UT2 is disabled and am using WOAI. The only other modules in the Addon Menu are Couatl, FSUIPC, EZdok. VistaMare, Addon Manager.
I noticed something else that is kind of weird as well. If I load a flight there with stormy or cloudy weather, somethings the runway lights will turn on on the runways 35l, 35c, but on the other side of the airport, the runway lights aren't on for 36l or 36r. Dont know if this is all part of the same conflict with the VASI/RSWL thing.