Bukkit

Hi,
i've tried what i think the instructions say but i can't make my world PVP DISABLED by default.
every time players log on they have pvp enabled.

Can you let me know what i need to change?
Config below.
I need PVP disabled in SURVIVAL, but all worlds would be ok too.
THANKS!

plugin:
  enabled: true
  debug: false
  updateinterval: 21600
  command: pvp
  worldguard-integration: false
worlds:
  Survival:
    enabled: false
    default: true
    cooldown: 10
    warmup: 10
  CreativeWorld:
    enabled: false
    default: true
    cooldown: 0
    warmup: 0
  MonsterArena:
    enabled: true
    default: true
    cooldown: 0
    warmup: 0
  ArenaWorld:
    enabled: true
    default: true
    cooldown: 0
    warmup: 0