how to use triggers?

i think i have triggers set up correctly.
they get created on load, they're enabled for all. i'm able to see them in the list when i go to use them. but
"trigger (name)" and "trigger (name) add 1" aren't working.
the function "trigger_(name)" isn't being called, nor is the function "(name)".
what do i need to do to get triggers to work? for all players.