Undefeatable baddie in sidetrack2.nw

So I’m doing the Zol’s Pub quest, for the chain, and after killing a room full of enemies in sidetrack2.nw I think an NPC is supposed to spawn. Problem is, there’s one baddie in there who just won’e die.

I don’t mean I can’t kill him, I mean he won’t die. I’ve cleared the room, bar him, and no matter how many times I strike him, he just keeps going. :S

updated the level, it’s working now…