Hi,
If a collider component is set as trigger it will not collide.
there are trigger actions and collider actions
You need to use the trigger actions if your collider component is set as trigger.
You can also have 2 colliders on your game object (for example 1 with trigger enabled and set bigger than the the other one.
There might be some tutorials that can help to get to know playmaker and colliders/triggers on the
user tutorial wiki page