OnClicked Event doesn't work on PaperFlipbook

Create an actor,with PaperFlipbook and PaperSprite(for test) under flipbook. When i try to click or touch Flipbook, i see only string from PaperSprite,when i remove PaperSprite, i didn’t see anything…So any onclick event didn’t work on paperflipbook.

Just forgot to put collision on my flipbook…