Why isn't my input not working?

Hey All,

Please can you help me,

Im using a substance graph in the blueprint. My Intention is to press page up or down it will alter the dirt level in my substance.

I first tried the normal key input in the blueprint but didn’t work, then tried mapping the key in the project settings, then tried using event Dispatches, then even tried event begin play but none of my inputs is works. All of my block inputs is Disabled so I have not got a clue why this isn’t work and its not even showing its firing either

Please can you help?

Many Thanks

Andrew Booth 3D
(aka Artboom91)