How to set aperture of Cinecamera at runtime?


I am unable to update the aperture of Cinecamera in the game via blueprint ? Using set aperture function
I am getting the value changed in the editor but its not getting reflected on the display. At runtime, I am changing the value with slider. slider changes the value of aperture . So at runtime if i CA select the cinecamera value is getting changed in the editor but not on the display