Why is the animation not triggered by the controller?

Hello everyone,

I’m new to developing VR stuff using unreal.
I currently have a problem to trigger the animation of the skeletal mesh.
Here’s the screenshots of what I did:

bookAnimationTest is a skeletal mesh that contains animation. When the vive controller collides the triggerVolumn, the book is supposed to play the animation(book opening). but no animation is played…
Can anyone tell me how to fix this problem? Thanks!
I’ve been googling a way to fix this problem but couldn’t find the answer… guess my problem is too basic. I’ll very much appreciate if somebody can help. :slight_smile: