The Triggers:Spawn Error

I create 2 mobs as one battle，I call them A and B,
when players kill A，A will summon B，and....player must kill B in 2 minutes，or it will summon A and remove self。
well，I create the skill：
RegenerateToPumpkin:
Cooldown: 10
Skills:
- message {m="The giant will get pumpkin again in 2 minutes！"}@PlayersInRadius{r=40}
- delay 1200
- message {m="The giant will get pumpkin again in 1 minutes！"}@PlayersInRadius{r=40}
- delay 600
- message {m="The giant will get pumpkin again in 30...

The Triggers:Spawn Error