Vehicles Not Being Displayed in P3D

[Buddy1958]

I've attached a few screen shots to show that some GSX vehicles are not being displayed at all in Prepar3d.  Not sure what the problem is.  I've (1) tried increasing the display properties in P3D - with sliders all the way to the right. (2) looked in the simobjects folders to make sure the vehicles are in the ground and miscellaneous folders (they are), and (3) compared the vehicles from my FSX installation to this one...they seem to be exactly the same.  Therefore, I'm at a loss as to why SOME vehicles just don't seem to display. 

Any help or suggestions are kindly appreciated.

Thank you.

[virtuali]

Your screenshots are not very clear, it would have been better if you posted a day shot. I can see several GSX vehicles in your screenshots, which ones are missing ?