New weapons of the dynasty.

Hey guys, can you help me figure out what's wrong? I wanted to get a Dynasty weapon using the Inferno mission. You know, the method. I downloaded it, replaced the files, followed all the instructions. And now, after more than half an hour, the Dynasty weapon still hasn't dropped, but I've gone through all the amulets. There are only amulets in the chests, and I haven't even seen any other items, let alone the Dynasty weapon. Can you tell me what the problem is? Why isn't it dropping?