Ok, after you click "New":

In the Pattern: section type in what you want the echo to fire on. So lets say you're doing this for disarm, you'd put something like "(*) disarms you" minus the quotations of course.

Then, in the box below, you'd type out "#ECHO {=*= DISARMED! =*=}" again, minus the quotations.

That should work. The #TRIGGER command is only used if you're typing it outside of the package editor thingy, in the command line where you'd typically type your mudding commands, like get pie sack and whatnot. lol.