Should I just add the terrain section?[sOUND]AmbientUIMusicVolume=-6.000000[Display]ChangeTime=4.000000TransitionTime=4.000000[Main]User Objects=Airplane, HelicopterSimObjectPaths.0=SimObjectsAirplanesSimObjectPaths.1=SimObjectsRotorcraftSimObjectPaths.2=SimObjectsGroundVehiclesSimObjectPaths.3=SimObjectsBoatsSimObjectPaths.4=SimObjectsAnimalsSimObjectPaths.5=SimObjectsMiscMaximized=1Location=124,102,1156,876,.DISPLAY1[PANELS]IMAGE_QUALITY=1DEFAULT_VIEW=0[Weather]WindshieldPrecipitationEffects=1MinGustTime=10MaxGustTime=500MinGustRampSpeed=1MaxGustRampSpeed=200MinVarTime=5MaxVarTime=50MinVarRampSpeed=10MaxVarRampSpeed=75TurbulenceScale=1.000000WeatherServerAddress=fs2k.zone.comWeatherServerPort=80WeatherGraphDataInDialog=0AdjustForMagVarInDialog=1DynamicWeather=0DownloadWindsAloft=0DisableTurbulence=0[DISPLAY.Device.RADEON X800 PRO.0]Mode=1152x864x32[CONTROLS]Controls_Default=StandardControls_Current=Standard[TextInfo.1]Latitude=1,1Longitude=1,2Altitude=1,3Heading=1,4AirSpeed=1,5WindDirectionAndSpeed=1,6[TextInfo.2]FrameRate=1,1LockedFrameRate=1,2GForce=1,3FuelPercentage=1,4[TextInfo.3]Latitude=1,1Longitude=1,2Altitude=1,3Heading=1,4AirSpeed=1,5WindDirectionAndSpeed=1,6FrameRate=2,1LockedFrameRate=2,2GForce=2,3FuelPercentage=2,4[slewTextInfo.1]Latitude=1,1Longitude=1,2Altitude=1,3Heading=1,4AirSpeed=1,5[slewTextInfo.2]FrameRate=1,1LockedFrameRate=1,2[slewTextInfo.3]Latitude=1,1Longitude=1,2Altitude=1,3Heading=1,4AirSpeed=1,5FrameRate=2,1LockedFrameRate=2,2[DynamicHeadMovement]LonAccelOnHeadLon=-0.020000LonAccelOnHeadPitch=-0.010000RollAccelOnHeadLat=0.010000YawAccelOnHeadLat=-0.100000RollAccelOnHeadRoll=0.100000MaxHeadAngle=5.000000MaxHeadOffset=0.300000HeadMoveTimeConstant=1.000000[VirtualCopilot]VirtualCopilotActive=0[GRAPHICS]SHADER_CACHE_PRIMED=1[uSERINTERFACE]PageID=1ShowAllACPaintSchemes=1SelectAircraftManufacturer=AllSelectAircraftPublisher=AllSelectAircraftType=AllOpenATCOnCreate=0[Trusted]D:Program FilesMicrosoft GamesMicrosoft Flight Simulator XGAUGESBendix_King_Radio.DLL.ncroeehhhqcehhecqkwbnaztlwtlrtwlbhorrczw=2D:Program FilesMicrosoft GamesMicrosoft Flight Simulator XGAUGES737-400.DLL.ontnboukkkrlnuuenokitklnkbnwbtuarburtizn=2[RWW_WEATHER_MAP]SHOW_AIRPORTS=0SHOW_VORS=0SHOW_NDBS=0SHOW_APPROACHES=0SHOW_INTERSECTIONS=0SHOW_VICTOR=0SHOW_JET=0SHOW_AIRSPACE=0SHOW_FLIGHTPLAN=1SHOW_WEATHERSTATIONS=1SHOW_WEATHERSYSTEMS=1SHOW_DATATAGS=1SHOW_TERRAIN=1

If that is a full copy of your FSX.cfg file then you've got a problem with it. Suggest you delete the current FSX.cfg file and restart FSX. When FSX starts and doesn't see a FSX.cfg file it creates a new default FSX.cfg file. Once done you should again have a full copy with default settings, and the Terrain section will be there.DougDell XPS Gen3 (3.6GHz/540FSB) | 2GB DDR SDRAM | 74GB SATA, 10k RPM (C: ) | 120GB SATA (D: ) | 512MB ATI Radeon X1900XTX (Catalyst 6.9) | Audigy 2 ZS Sound | MS Force Feedback 2 | WindowsXP Pro (SP2) | DirectX 9.0c