Guys, I have inquired this problem via PMDG Support and they replied that they are already aware of this. They have not found a root causeof this problem yet they have managed to dupulicate this problem. I would sudgest you guys if you can provide as much as info to PMDG so they cananalyze further. I have submitted DX diag and Windows Event Log to them. Hope they can come up with some solution for this but they are really tryingmake their NGX better so thumbs up for them :Peace:KENJI