Can I make My event dispatcher work for multiple class BPs of the same kind?

I have an enemy. When it overlaps with me it calls an event dispatcher. IN the level blueprint, when called it trigger the post processing to be cut on and back off. no problem.

However, If I copy and paste my enemy BP all over the map the event dispatcher only works with the first enemy…none of the copies of the BP all over the map trigger the post processing…anyone know why that is??

THANKS!!!

If thats not possinle.can someone think of another way I could do what im trying to do??