cob_people_detection problems with creating training data

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Hi, I try to use the cob_people_detection on ros kinetic with ubuntu 16.04. I'm using the SR300 with realsense packages to create image and pointcloud. Now I have two proplems:

When I try to adjust the frame rate in people_detection_client I get no response. The people_detection.launch shows Waiting for service /sensor_message_gateway/sensor_message_gateway/set_parameters... The service doesn't show up when I use rosservice list

When i try to capture face images i get the warning

Either no head or more than one head detected. Discarding image.

Edit: first problem solved by changing the name in the coordinater.launch