As the subject mentions, that's just what happened to me.Does anybody have an idea what I must have done do acomplish this?Or better, what I could try to get it back, without having to re-setup the whole lot?I would be very, very happy.Frans

Hi Frans, Have you lost the default traffic or WOAI or both? Have you created a separate folder for your AI aircraft, like I have done? If so and you let FSX rebuild your CFG file, you'll need to manually re-enter the simobjects path in the fsx.cfg. For example, I created a folder called AI Traffic used to hold my aircraft. In the FSX.cfg I then need to add the lines: SimObjectPaths.6= SimobjectsAI Traffic - otherwise no traffic. Hope it helps. Regards, Kendall#1: E8500 @ 3.95 - HyperTX2 Gigabyte P35-DS3L 4GB Ballistix Tracers PC6400 EVGA 8800GT - XG's 174.74 Seagate 250GB 7200.11 CH Yoke/Pedals/Saitek Throttle Dual Monitor: Dell 2405/1905 #2: Dell 8400 3.2 H.T. 3GB PC4200 - X800XT Diamond Xtreme/Logitech X-530's