Plague Aura on a Sentry Ward

I've been trying to make a hero spell that allows me to place sentry wards with the plague aura on them to do damage per second in a radius. When I put the aura on the ward in the UnitAbilities.slk, I can place the ward and see the plague cloud animation, but it doesn't do any damage. Why not? As usual, any help is appreciated.

did you give it the abom's plaue ability?

No, I gave it the creep plague aura. I suppose I could try the Abom one. Thanks for the reply.

Still doesn't work...

try and base it off a targeted summoning spell like darkportal then detect when wutever comes into the map and replace it with a plagued ward

Scio didnt we both try and do this before but just as a unit?

If I were gonna do that, couldn't I just change the unit summoned code on a summoning spell to a plagued ward? That I think I've tried, which might be how I got the animation to work, but no damage came from it. I'll try though.