CineCamera Focus via MIDI Fader

So i got my MIDI Board to run and i can control sun position with one Fader, now i want to control the Focus of the CIneCamera with another Fader.
I made a function, which feeds into “Set members in CameraFocus Settings” and pinned the Manual Focus Distance.
I also defined a Input in the Function to Read the FaderValue, and mapped that to the focus range i want and feed that into the focus Distance Value

Then i defined a Variable which is public and the VaribleType is “Camera Focus Settings” this Var. feeds into the Struct Ref of “Set members in CameraFocus”

However, when i move the Fader, nothing happens, any clue what i have done wrong ? Im wuite new to blueprints, so sorry if this is a noob questions. Thanks