Disguised Mobs Tameable ? Where is the mistake ?

Pet1:
Mobtype: wolf
Display: '&a&lSpider'
Health: 25
Damage: 3
Armor: 4
Drops:
- 0Ep
Skills:
- Skill {s=PLeap} @onCombat >0 0.5
Options:
Despawn: false
Disguise:
Type: spider
Tameable: true