Bile isn't nice

[Crovax_Dark_Lord]

I am a warrior with 13 wisdom, 3 grace points and worships Bile.
I bought a wand and a prayerbook of cause light wounds, I learnt it and cast it and when I used my wand it said "Bile ignores your prayer" Is this a bug or does bile not let you cast harmful spells, is is because of my stats, if so please give a solution and/or a suggestion on a spell I may be able to cast given my Bile worship and stats, thank you.
edit: The spell is sp (spell points?) 8 and ev 1, whatever they might mean.