why pr2_nav_tutorial does not work [closed]

edit

hi,could somebody help me? when I run these commands form pr2_simulator/tutorials in fuerte_distro,the above problem I get from the sencond terminal.(*

Aborting because a valid control could not be found. Even after executing all recovery behaviors

*) Also,my robot won't move in the rviz & gazebo. link site:"http:wiki.ros.org/pr2_simulator/Tutorials/BasicPR2Controls"

the commands I use:

roslaunch pr2_gazebo pr2_empty_world.launch

roslaunch ~/pr2_nav_tutorial.launch

roslaunch pr2_teleop teleop_keyboard.launch

roslaunch pr2_navigation_global rviz_move_base.launch

addition:my envirment is:

$ uname -a

Linux nancy-computer 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

$ lspci | grep VGA

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation Device 1180 (rev a1)

$ cat rosstack find simulator_gazebo/CMakeLists.txt

cmake_minimum_required(VERSION 2.4.6) include($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)

rosbuild_make_distribution(1.7.13)