Hi,
I don't know where you got it from to begin with, so I am not sure what it does, first time I encountered it.
Triggers are built in PlayMaker, so you should need this in your case. Remove it and try again. Also, can you paste a screenshot of your fsm where you are trying to get this trigger?
and are you not confused between triggers and colliders? they both need a collider component but you can turn that collider into a trigger if you decide too ( not stopping other colliders, simply alerting it's been touched).
Bye,
Jean