Bukkit

What steps will reproduce the problem?
1.  Start the game pass the first check point and use /pk last or /pk last 1
2.
3.

What is the expected output? What do you see instead?
parkour cmd /last would not work for me it says " you didnt supply enough arguments for this method"

What version of the product are you using?

Last version
Do you have an error log of what happened?

Please provide any additional information below.
yes, i did setted the checkpoints with world edit and even used expand I use 1.5.2