Issues with DropTables

Hi;

I'm trying to work on drop tables with 3 new bosses and none of them are dropping anything.

Mobs:
ExoSpider:
Type: ENDERMITE
Display: '&5ExoSpider'
Health: 40
Damage: 45
Drops:
- ExoSpiderD
Options:
MovementSpeed: 0.4
PreventOtherDrops: true
Sythen:
Type: ZOMBIE
Display: '&dSythen'
Health: 50
Damage: 60
Drops:
- SythenD
Options:
MovementSpeed: 0.2
PreventOtherDrops: true
Snitch:
Type: Spider
Display: '&6&lSnitch'
Health: 3...

Issues with DropTables