ROS_Control: Controller doesn't get loaded

Hi there. I'm using ROS Indigo and Gazebo2 I'm trying to implement a controller for my revolute joint in Gazebo. For that I looked how the controlling problem was solved with the rrbot or the mybot. However, when I try to start my controllers using a roslaunch file: I get the following error message: [ERROR] [WallTime: 1480112626.683817] [0.000000] Failed to load linksController [ERROR] [WallTime: 1480112627.691181] [0.000000] Failed to load rechtsController As well as [ERROR] [1480112625.682869242]: Could not load controller 'linksController' because the type was not specified. Did you load the controller configuration on the parameter server (namespace: '/erod/linksController')? The whole procedure worked perfectly for rrbot and for the mybot but somehow it won't work for my new robot. Thanks for your help EDIT: My controller yaml file looks like this erod: # Publish all joint states ----------------------------------- joint_state_controller: type: joint_state_controller/JointStateController publish_rate: 50 # Effort Controllers --------------------------------------- linksController: type: effort_controllers/JointEffortController joint: front_left_bar_joint pid: {p: 100.0, i: 0.1, d: 10.0} rechtsController: type: effort_controllers/JointEffortController joint: front_right_bar_joint pid: {p: 100.0, i: 0.1, d: 10.0}