Warning + Error message while trying to start Kinect with ROS Groovy

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I am getting the following warning and error messages while trying to start Kinect using openni in ROS Groovy.

[ INFO] [1392447768.640379198]: Number devices connected: 1
[ INFO] [1392447768.640669716]: 1. device on bus 003:15 is a SensorV2 (2ae) from PrimeSense (45e) with serial id 'B00361702524042B' 
[ INFO] [1392447768.642870790]: Searching for device with index = 1
[ INFO] [1392447768.730364791]: Opened 'SensorV2' on bus 3:15 with serial number 'B00361702524042B'
[ INFO] [1392447769.452707110]: rgb_frame_id = '/camera_rgb_optical_frame' 
[ INFO] [1392447769.452883894]: depth_frame_id = '/camera_depth_optical_frame' 
[ WARN] [1392447769.459691362]: Camera calibration file /home/piyush/.ros/camera_info/rgb_B00361702524042B.yaml not found.
[ WARN] [1392447769.459921064]: Using default parameters for RGB camera calibration.
[ WARN] [1392447769.460116262]: Camera calibration file /home/piyush/.ros/camera_info/depth_B00361702524042B.yaml not found.
[ WARN] [1392447769.460288311]: Using default parameters for IR camera calibration.
[ERROR] [1392447773.721890264]: Tried to advertise a service that is already advertised in this node [/camera/depth_registered/image_rect_raw/compressedDepth/set_parameters]
[ERROR] [1392447773.820395404]: Tried to advertise a service that is already advertised in this node [/camera/depth_registered/image_rect_raw/compressed/set_parameters]
[ERROR] [1392447773.995215849]: Tried to advertise a service that is already advertised in this node [/camera/depth_registered/image_rect_raw/theora/set_parameters]

What should I do to resolve them? Thanks in advance.