I am trying to create an audio occlusion system, it kind of works however when I try to set the LPF frequency, it doesn't change (ue4)

Question

When I print out what the Low Pass Filter is its fine, however when I get the LPF frequency from the audio component reference it doesn't change. any ideas or suggestions?

Here is a link to my code:https://blueprintue.com/blueprint/x0hnwumi/