Could you be a little more specific? Is it a common event or map event? Do you want it to trigger when the player touches it or when the event touches the player?
What exactly is it you wish to accomplish?
A little more info on what you're trying to do would help anyone who is trying to help you.
I know whenever I ask for help people usually need more to go on than just a simple 'help me'.
If I sound brash, my apologies, I don't mean to. I'd like to help if I can, but I'll need a little more information.