Robotis dynamixel workbench joint_operator not working properly

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I try to run the following file with the dynamixel workbench joint_operator (newest version from github) on kinetic:

joint:
  names: [joint1, joint2, joint3 ,joint4 ,gripper]
motion:
  names: [right, zero, left, zero2]
    right:
    step: [0.0, 0.0, 0.0, 0.0, 0.0]  # radian
    time_from_start: 20.0  # sec
  zero:
    step: [3.0, 3.0, 0.0, 0.0, 0.0]
    time_from_start: 45.0
  left:
    step: [0.0, 0.0, 0.0, 0.0, 0.0] 
    time_from_start: 65.0
  zero2:
    step: [0.0, 0.0, 0.0, 0.0, 0.0]
    time_from_start: 85.0

Instead of moving very slow as the first 20s require, the Dynamixel XM540 start with max speed. No matter what I do, change the position in "step" or the time, its always the same... anyone who can help?