Why won't my scale work?

So i got this fence blueprint for the content example and started tweeking it so it would fit my needs.
Basically its a blueprint and you give it two meshes, one for the end and start point and one for all the parts in-between.
Now i want to enable the user to scale it, because the mesh might be to large or small but it’s not working.
This is what the blueprint looks like:

It sometimes can be a problem to scale the root component, I didn’t look into your system, but perhaps you want to check it.