Stoppin sound

Hey guys,

Im trying to stopp the sound by clicking a button. But first of all I try to stop the sound by clicking a input key like F. I created a blueprint with the parent class ambientsound. In it a audio component with the sound Id like to play. I use the nodes Activate and Deactived. When I connect them to eventbeginplay both of them are working. But when I want to deactivate the sound by pressing a input key it doesnt work… Any help apreciated