run_action crash

[onemanstartup]

I have this code.

class PersonSprite < Joybox::Physics::PhysicsSprite
  def move_left
    self.runAction @walking_action unless self.running_actions?
    self.flip x: true, y: false
  end

  def move_right
    self.runAction @walking_action unless self.running_actions?
    self.flip x: false, y: false
  end
end

move_left working and move_right is not.

2014-01-27 07:39:47.361 Code Red[15426:8003] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CCRepeatForever duration]: unrecognized selector sent to instance 0x7f88087d4330'
*** First throw call stack:
(
    0   CoreFoundation                      0x00007fff8408541c __exceptionPreprocess + 172
    1   libobjc.A.dylib                     0x00007fff87122e75 objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff840882ed -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
    3   CoreFoundation                      0x00007fff83fe35b2 ___forwarding___ + 1010
    4   CoreFoundation                      0x00007fff83fe3138 _CF_forwarding_prep_0 + 120
    5   Code Red                            0x000000010a3d8fe5 -[CCSequence initOne:two:] + 46
    6   Code Red                            0x000000010a3d8fa0 +[CCSequence actionOne:two:] + 48
    7   Code Red                            0x000000010a3d8f47 +[CCSequence actionWithArray:] + 116