Oracion Banish Effect %?

[coldfire]

Trying to get the Exorcism emblem on a Hawkman (no reason, just like the look of full emblems) so I equipped him with Oracion but after ~10 tries, he has yet to banish a single dead ghost/zombie!
I know I've used it before (haven't played the game in years) and don't remember if I'm missing something?
I don't remember it being that unlikely, is it just a fluke?

[coldfire]

Huh, for some reason I don't remember using exorcism/banish on still living undead/ghosts, couldv'e sworn you had to use it on the corpses to ensure they didn't pop back up to life!
Oh well, figured it out.

[Knight of Lodis]

Try using it on living skeletons and ghosts. Also understand that the exorcism usage with the item is not necessarily 100% accurate every time.