Problem with Mythic Mob drops

I've been trying to get mobs to drop custom items. However, they do not drop. Tried with drop tables with same results. Instead, they drop the Mob Type drops. Wondering if there is something wrong with compatibility between versions of MM and spigot/mc.Edited with Notepad++

MM V.4.1.0 Spigot spigot-1.8-R0.1-SNAPSHOT-latest.jar MC Server 1.8

Drops:
- SkeletonKingDrops

SkeletonKingDrops:
Conditions:
- playerwithin {d=40}
Drops:
- KingsCrown 1 1
- 371:0 32-64 1
- exp...

Problem with Mythic Mob drops