autocasting

i gave a building an ability with autocast. i set the ability to detect self, structure and mechanical, but when i activate autocast, nothing happens. how can i get this ability to detect the building and autocast the spell?

The autocast may only run if the building is attacked. Alot of autocast spells are like that on units. Which spell are you using?

i copied the inner fire spell and erased all the values.

i want my stuff to happen like this:
i activate autocast, then the building automatically casts the spell (although i don't want the spell to actually do anying)
then use triggers to actually cast the spell;
EVENT:
unit begins casting spell
CONDITION:
spell being cast is equal to <blah>
ACTION:
triggering unit (a barracks) trains a footman every X seconds

EVENT:
units stops(or finishes - does it matter?) casting spell - meaning i've deactivated it
CONDITION:
spell being cast is equal to <blah>
ACTION:
turn off trigger 1 - that should make it stop training the footmen
turn on trigger 1 - turn it on again so i can continue to cast the spell


i don't care what spell i use, as long as it's autocast and it automatically starts casting the spell right away. if i could edit a spell so it trains the footmen on its own without using triggers that would be even better. maybe i should use a spell editor or something.

See thatz what i thought inner fire requires some hostility in the area to make it start casting.

i just tried using replenish mana (i gave the barracks some mana with no initial mana) and it still won't auto heal itself.

Seems how you don't want it to do anything, why use an Autocast, use a spell that has an on and off mode (Immolation comes to mind...) Instead. Then it should work.

i tried immolation, but i can't get it to stop. what happens is when i turn it on, the spell button goes "off" and i can't click it to actually turn it off. plus when i selected 5 barracks and did that spell, it lagged the game horrendously.