Kinect depth camera got ERRORS!

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I can not open my depth camera on my Kinect when I use freenect package,and I got errors like follwing,could you help me ?

[ INFO] [1446804753.661709266]: Starting a 3s RGB and Depth stream flush.
[ INFO] [1446804753.661829291]: Opened 'Xbox NUI Camera' on bus 0:0 with serial number 'A22596705403327A'
[ WARN] [1446804754.800842567]: Could not find any compatible depth output mode for 1. Falling back to default depth output mode 1.
[ INFO] [1446804754.815870621]: rgb_frame_id = 'camera_rgb_optical_frame'
[ INFO] [1446804754.815933870]: depth_frame_id = 'camera_depth_optical_frame'
[ WARN] [1446804754.830528673]: Camera calibration file /home/unicorn/.ros/camera_info/rgb_A22596705403327A.yaml not found.
[ WARN] [1446804754.830604644]: Using default parameters for RGB camera calibration. 
[ WARN] [1446804754.830654848]: Camera calibration file /home/unicorn/.ros/camera_info/depth_A22596705403327A.yaml not found.
[ WARN] [1446804754.830695204]: Using default parameters for IR camera calibration. 
[ INFO] [1446804757.091943001]: Stopping device RGB and Depth stream flush.