The problem you are having is with your name references. In your process flow you acquire the elevator and the operator, but then you assign both of them the label "resource" so the token's reference gets over written. Then you don't use the labels that they receive from the Acquire activity, or call the wrong object to be loaded.. You need to make sure you are using the labels to reference the correct object.

(Also you forgot to include certain parts of information in the process flow. Such as the destination location for the elevator. Or moving the operator out of the elevevator back into the model.)
I posted a model in a previous question you had asked that demonstrates how to connect the Process Flow to the elevator / operator model. You can use this as a reference if you need.
elevatoroperator.fsm
Also, I highly recommend going through the Process Flow tutorial in the manual to get a better grasp of referencing and connecting to the 3D model.