actionlib fibonacci_server doesn't move at all

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Hi, I am a beginner to use ROS. (ubuntu 12.04, and ROS distribution is hydro. but I have installed both groovy and hydro.)

Now, I finished Beginner Level of Core ROS Tutorials and then tried to do actionlib_tutorials.

I only followed the instructions in this URL ( http://wiki.ros.org/actionlib_tutoria... ),

Start a roscore in a new terminal

$ roscore

Until the section above, I did well.

But in the next section below, I failed.

And then run the action server:

$ rosrun learning_actionlib

fibonacci_server You will see something similar to:

[ INFO] 1250790662.410962000: Started node [/fibonacci], pid [29267], bound on [aqy], xmlrpc port [39746], tcprosport [49573], logging to [~/ros/ros/log/fibonacci_29267.log], using [real] time To check that your action is running properly list topics being published:

If I command the sentence below,

$ rosrun learning_actionlib fibonacci_server

there was no response.

I would like to know why.

If I run the command

$rostopic list -v ,I got these messages.

Published topics: * /fibonacci/feedback [learning_actionlib/FibonacciActionFeedback] 1 publisher * /rosout [rosgraph_msgs/Log] 1 publisher * /rosout_agg [rosgraph_msgs/Log] 1 publisher * /fibonacci/status [actionlib_msgs/GoalStatusArray] 1 publisher * /fibonacci/result [learning_actionlib/FibonacciActionResult] 1 publisher

Subscribed topics: * /fibonacci/goal [learning_actionlib/FibonacciActionGoal] 1 subscriber * /fibonacci/cancel [actionlib_msgs/GoalID] 1 subscriber * /rosout [rosgraph_msgs/Log] 1 subscriber