[Help! I have a little prob with skript.]

HELP!!

I just want to change the location of a player by a skript comman but i dont know how it workss!

I've already got this:

command //warps:
  trigger:
    open virtual chest inventory with size 1 named "&0Warp Menu" to player
    format gui slot 0 of player with nether star named "&5Warp 1" to run:
      set location of player to 136 121 -137        <-----
      send "all set" to player

the one underlined doesn't work pls help me.

[Isn't there any mapplugin?]

Is there a plugin in which I can oversee my minecraft world? Such as dynmap or something like that. If there is would you be so kind to tip me? That would be very helpful. Thanks