Openni in Gazebo for Kinect

Hello, Do you know how can i use kinect in Gazebo with openni? I specifically want to use the find_object_2d package in ROS, which requires the rgbd data to be registered, and i want to do that with openni. However when i launch it the required topic of depth registered do not get published. I am also using a openni kinect gazebo plugin already according to the tutorial. Thank you