Problem with trigger not creating unit

[terranempire]

So, for some reason this trigger doesn't create any unit at all.
I have used test messages and they displayed all the way through.

• Trigger
  • Events
    • Unit - A unit Finishes casting an ability
  • Conditions
    • (Ability being cast) Equal to Ability
  • Actions
    • Set TempLoc = (Position of (Target unit of ability being cast))
    • Unit - Create 1 Unit for (Owner of (Casting unit)) at TempLoc facing Default building facing degrees
    • Custom script: call RemoveLocation(udg_TempLoc)

The dummy ability is based on the firebolt (neutral hostile) ability and only targets structures.

 

[Pharaoh_]

Use "starts the effect of an ability" as an event. Finishes casting refers to channeling spells, while Firebolt is not one.

 

[terranempire]

Use "starts the effect of an ability" as an event. Finishes casting refers to channeling spells, while Firebolt is not one.

Oh right, thanks!