Hi
It's not on the gui site, it's on that wiki page:
Listening to NGUI Events
1: Drag the "NGUI PlayMaker Proxy" prefab into your scene. It will make available a set of global events "NGUI / XXX"
1: In your GameObject target where you want to listen to nGui events, add the "NGuiEventsToPlaymakerFsmEvents" script
3: Set the "NGuiEventsToPlaymakerFsmEvents" component to target the fsm of your choice ( it will pick the first one attached if it finds one)
4: In the Fsm, add the ngui global event you want from the context menu. for example "NGUI / ON SUBMIT", and NGuiEventsToPlaymakerFsmEvents component will turn the submit event green so you know it's properly set up on that front.
Have you done that?
Also, have you studied the examples provided? it's downloadable on that wiki page too.
Bye,
Jean