hi everyone!! I'm doing the tutorial in pr2mechanism section (http://www.ros.org/wiki/pr2mechanism/Tutorials/Running%20a%20realtime%20joint%20controller): Running a real time controller, i followed every single step but i get the following problems when i try to load the controller.. any suggestions?

luigi@luigi-pc:~$ rosrun pr2controllermanager pr2controllermanager list-types ethercattriggercontrollers/MultiTriggerController ethercattriggercontrollers/ProjectorController ethercattriggercontrollers/TriggerController mycontrollerpkg/MyControllerPlugin pr2calibrationcontrollers/CasterCalibrationController pr2calibrationcontrollers/FakeCalibrationController pr2calibrationcontrollers/GripperCalibrationController pr2calibrationcontrollers/JointCalibrationController pr2calibrationcontrollers/WristCalibrationController pr2controllermanager/TestController pr2mechanismcontrollers/CasterController pr2mechanismcontrollers/CasterControllerNode pr2mechanismcontrollers/LaserScannerTrajController pr2mechanismcontrollers/Pr2BaseController pr2mechanismcontrollers/Pr2BaseController2 pr2mechanismcontrollers/Pr2GripperController pr2mechanismcontrollers/Pr2Odometry robotmechanismcontrollers/CartesianPoseController robotmechanismcontrollers/CartesianTwistController robotmechanismcontrollers/CartesianWrenchController robotmechanismcontrollers/JTCartesianController robotmechanismcontrollers/JointEffortController robotmechanismcontrollers/JointPositionController robotmechanismcontrollers/JointSplineTrajectoryController robotmechanismcontrollers/JointTrajectoryActionController robotmechanismcontrollers/JointVelocityController youbotdescription/CartesianComplianceController youbotdescription/JointPositionController youbotdescription/JointVelocityController youbotdescription/YouBotUniversalController luigi@luigi-pc:~$ rosrun pr2controllermanager pr2controllermanager load mycontrollerpkg Error when loading mycontrollername

Thank you in advance

Luigi