@Guest: My name is cliffette. You found my bug, prepare to die!
I'm away for a couple of weeks but when I return I will fix this thing (again again, I thought it had been fixed). If Minsc's stats are too much for you, then my suggestion is to edit him with some suitable editor, but I can't help you right now.
Esabulao, I am scheduled to redo the quest (again again) so that it triggers, is longer, is better, is bug free, etc, but that won't happen until I have free time and an impetus to go back into the horrible horrible code I wrote for this quest. My urge is to rewrite the monster from the ground up because it was meant to be longer, thus justifying the rewards and this paragraph has gone on long enough, so maybe someone who knows what the triggers are can help you.
@Moongaze: What do you mean by messed up? Was it permanently set to a crazy number?