TurtleBot Kinect Problem [closed]

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I am following the tutorial "Visualizing TurtleBot Kinect Data", but I cannot see the data from camera...

roslaunch turtlebot_bringup kinect.launch

it gives:

[ INFO] [1362547950.940390473]: [/openni_camera] Number devices connected: 1
[ INFO] [1362547950.940926034]: [/openni_camera] 1. device on bus 001:10 is a Xbox NUI Camera (2ae) from Microsoft (45e) with serial id 'A00367910023104A'
[ WARN] [1362547950.950968862]: [/openni_camera] device_id is not set! Using first device.
[ INFO] [1362547951.051461572]: [/openni_camera] Opened 'Xbox NUI Camera' on bus 1:10 with serial number 'A00367910023104A'
[ INFO] [1362547951.114948505]: rgb_frame_id = 'camera_rgb_optical_frame' 
[ INFO] [1362547951.127139480]: depth_frame_id = 'camera_depth_optical_frame'

Then on the Workstation, I type:

rosrun rviz rviz

Add camera -> Image Topic -> whatever...

The rviz window shows No Image

And the terminal shows Dropped 100% of messages

Closing rviz, now on the Laptop, I try:

rosrun image_view image_view image:=/camera/rgb/image

It just shows a gray window.

Anyone has any idea what is wrong?

TurtleBot (Kinect, iRobot Create); Ubuntu 10.04; ROS Electric

Please help me!! Thank you very much.

More information: (1) the Kinect shows a flashing green light (not solid light); (2) in rviz, under camera, it says Global Status: Error. Inside it says ... No Transform.