[Panzerfather]

That will not work ! The Error:

1. You deleted the WeaponSet and left the "END" tag !

  ; ***DESIGN parameters *** 
  DisplayName           = OBJECT:Humvee2 
  Side                  = America 
  EditorSorting         = VEHICLE 
  TransportSlotCount    = 3                 ;how many "slots" we take in a transport (0 == not transportable) 
End

To:

  ; ***DESIGN parameters *** 
  DisplayName           = OBJECT:Humvee2 
  Side                  = America 
  EditorSorting         = VEHICLE 
  TransportSlotCount    = 3                 ;how many "slots" we take in a transport (0 == not transportable) 
Weaponset
End

2. Do the AIUpdateInterface after the ActiveBody !

Behavior = AIUpdateInterface ModuleTag_20 
    AutoAcquireEnemiesWhenIdle = Yes 
    MoodAttackCheckRate        = 250 
  End

That should work !