Your screenshot is not very clear (please, don't send .PNG files, they are very large to download, send .JPG), and it's difficult to see if you have some default buildings appearing.
On top of that, you have *parts* of object showing, which also indicates a video driver or an FSX settings problem.
So, it SEEMS you have two problems at the same time, none of them caused by any of our products, of course...
1) If you have default buildings showing up, then you have another AFCAD for the same airport in conflict. These are commonly caused by AI Traffic product that comes with their own AFCADs, which should be used ONLY if you use the default airport, otherwise they will cause problems. Use the free FSX Airport Scanner program to find and remove them.
2) You have partial buildings showing up, this is a video driver or setting problem, try all the following:
- Update your video driver
- Reset your video driver settings to default
- Reset the FSX settings to default, by removing the following file:
%APPDATA%\Microsof\FSX\FSX.CFG
This will force FSX to rebuild a new config with all default settings. After doing this, be sure you apply the HIGHMEMFIX tweak in the Addon Manager, save the settings and restart FSX.
If this still doesn't fix it, be sure you don't run FSX into any of the "Compatibility" modes. Every checkmark in the Compatibility tab of the Properties for FSX.EXE should be off.