Play Anim Montage not Working

[anonymous_user_fbafa5cd]

I tried the state machine but, it needs to hold left mouse to play,

I want to make it like dragonNest attack system
I actually saw a tutorial just like that, but it seems not working.
in the tutorial playAnimMontage from CharacterBP, it’s working, then I tried nothing happened, I don’t know why

Thank for your Answer