Scroll of Fire Scream bug

right now I have 7000 agility with my Dark Lord.
When I cast Fire Scream on a Dark Horse, I do not see my skill. But others does. But most important it doesn't do any damage.
When I remove my Dark Horse and cast Fire Scream, I can see my skill working perfectly fine. But again it doesn't do any damage.

Please take a look at it.

Thank you,

Hakibi

it is because of your agility, try to add some more, SM also have problem like this.