Service Vehicles not Showing FSX SP2

[Waterside 4]

Hi,

I have recently accquired the PMDG 747 QOTS II and it is a phenomenal add-on! However, I am having trouble showing some of the included vehicles, such as the maintenance van, cleaning, portable water and the trucks towing the GPU etc. I can see the blinking light and I am able to see the headlights and tail lights illuminate the ground at night, but I cannot see the vehicles themselves.
I am able to see all the highloaders and stairs and the GPU.
I have tried it at various airports, without success.
I do have the latest version of FSUIPC installed and I am running GSX. However, when trying the the ground vehicles of the 747 I did not run GSX.

[tcas_climb 45]

in the FSUIPC.ini there is a line in there that involves removing ground vehicles when using AES. Cant remember what its called exactly, but search the .ini file for AES and change it from =YES to =NO

[Waterside 4]

Hi Bryan, 

thanks for your reply. I do not have AES installed. I checked the FSUIPC.ini file anyways for that section, but I couldn't find it. 
I am still having the same trouble with the missing vehicles.