problem with drop

I made a custom mob for adena. But he doesn't drop any adena. I added an entry to `droplist` with a chance 1000000 (that's 100% I think), but he doesn't drop any. What's the problem?

EDIT: It started dropping but not 100% - around 80% of the times. How can I make the adena not dropped but EARNED - like in quests.