Custom Item doesn't appear, when some does

[The chaser]

I don't think a static_prop can be set active, and inactive That's what i'm trying to achieve.

EDIT: What do you mean by -Mesh in what you said?

Under Body_1 i have BodyShape_1 and polySurface164

Ok, then the model hierarchy is right. A static_prop cannot have bodies or it will be set invisible (or that I think). You can consider too sending me the model so I see what is wrong with it.