Help with Duerger(spoilers)

[Kalak]

Alright, right after the dragons there is an area with duerger in an outpost...I talk to the head man and he tells me I can go anywhere except their dungeon. Fine, I don't really like dungeons that much anyway, they always smell funny. But, I go down the hall and find this weapon technician, solve his problem and he gives me a spiffy crossbow that fires twice a round and is magical for all intents and purposes. Only problem, all the duerger keep getting ticked at me and attacking...I didn't see any signs that said dungeon through this door and didn't go down any stairs. Any ideas what's setting them off, and where IS their dungeon and what's down there that I'm not supposed to see?

[Magness]

Sorry. Can't help you with your question. My "good" party took their reward for clearing out the hook horros, et.al., then proceded to wipe them out and take the great crossbow out of their cold dead hands. BTW, when you go this way, you get a xbow that fires 3, instead of 2, bolts per round.

Initialliy I was going to do their 2nd mission, to wipe out the Raven Talon monks. But when my party discovered that the monks were basically good, I decided that the deurgars had to go instead. Amusing long battle. Lots of deurgars and their slave soldiers.

[Kalak]

Alright, now I figured out previous problem...sorta, but I can't seem to kill everything down in the caves...I've killed all the hook horrors, the trolls, the ochre jellies, firebeatles and even when to the next screen and killed all the forgot what the cave things are...anyway, is there some hidden monster someplace...went to every room, and really don't want to walk through it with a thief on search.