The problem with the quest \"Black market\" (Divine Divinity)

Good afternoon. Like the whole sequence in this quest was: the cart found, a wheel carried on the Eyelet pressed, the Lieutenant spoke, a letter from Pedro the inventory is in a dungeon at the market square came down, the warehouse on the right found Pedro had stopped there. As we approach the Marcos - he asked if I found his product. Dialogue about what you've found does not appear. And tasks are two: one to find product Brand, the second is to find a supplier. Here I think. what can I provider not found? Who is he and where is he? And can that not so made? Anyone knows tell me. Thanks in advance.