Can't move a spline object (interactive gate)

Hello !

I use “Spline-Enabled Fence Pack” (from Marketplace) for drawing a fence.
One element of fence is set as “Gate” and is named “Fence_Gate”. It’s need to move this element by using BluePrint. In result it should be interactive opening gate.

I saw an examples of interactive door BP, and created a blueprint like there.
There is a reference “Ref_Gate”: it’s a variable with the type ObjectType/Actor/Reference. I see this variable in the user interface of Edit. In the drop-down list of variable I see all objects of my scene, including the Fence_Gate.

Problem :
If I assign standard object “Cube” to my variables Ref_Gate – the Cube is moving. It works ok.
But if I assign object “Fence_Gate” into the Ref_Gate variable – the objects “Fence_Gate” doesn’t move.
I don’t understand – why ?

Maybe the spline object shall have some special reference?
How I can move spline object like Fence_Gate in the blueprint?

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Make sure that your Fence is set to “Moveable” and not “Static”

Yes, I read about this option. But object Fence_Gate does not contain this option in the group “Transform” in the Editor.
Usual objects like Cube have this choice : Static/Movable :

But spline object Fence_Gate has no it :