Is it me?

[Sabre]

Or is there something wrong with the reward system for the blacksmith?
Nothing has spawned on the forge after I kill him for about the last 10 times... I'm gonna try reinstalling calruin2...If that doesn't work...Help?

 

[HumanSteak]

Did you activate the seals? It won't drop anything if ya don't
Even if the volcano doesn't hit him once, it's all good.

 

[Sabre]

Hrm...Guess that's it...

 

[J-M v2.5.5]

I think this is how the system works:

There's a multisource somewhere in the map that activates the forge when it's triggered at least twice. If you kill the boss, the multisource is triggered, and if you successfully activate the volcano trap (before killing the boss), the multisource is triggered.

That should explain why you get no reward if you don't kill him without the volcano trap.

Just speculating though, but I think that's how the system works.