WE Unlimited not accepting my trigger?

WE Unlimited not accepting my trigger?

I made this trigger so that when a unit is taking damage, will show it's 'stand hit' animation.

The trigger sounds like this:

Event:
Unit takes damage

Action:
Play [attacked unit]'s stand hit animation.

What's wrong?

cuz attacked unit is not the same as a unit taking damage. the problem is the creator of WEU (pitzermike i thought) forgot the triggering unit for a unit taking damage. it can only detect the unit dealing the damage (damage source)