[rviz] Unable to create the rendering window

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Hi all, I want to run the simulation http://www.ros.org/wiki/urdf/Tutorials/Building%20a%20Visual%20Robot%20Model%20with%20URDF%20from%20Scratch

but as soon as i run command

roslaunch urdf_tutorial display.launch model:=01-myfirst.urdf

it gives me errors as listed below

process[rviz-3]: started with pid [8013]

Config file '/home/sanket/.rviz/config' could not be opened for reading.

Xlib: extension "GLX" missing on display ":0.0".

rviz::RenderSystem: error creating render window: std::exception

rviz: /tmp/buildd/ros-fuerte-visualization-1.8.13/debian/ros-fuerte-visualization/opt/ros/fuerte/stacks/visualization/rviz/src/rviz/ogre_helpers/render_system.cpp:263: Ogre::RenderWindow* rviz::RenderSystem::makeRenderWindow(intptr_t, unsigned int, unsigned int): Assertion `false' failed.

[rviz-3] process has died [pid 8013, exit code -6, cmd /opt/ros/fuerte/stacks/visualization/rviz/bin/rviz -d /opt/ros/fuerte/stacks/robot_model_tutorials/urdf_tutorial/urdf.vcg __name:=rviz __log:=/home/sanket/.ros/log/5e4ebc6c-c928-11e1-950f-848f69c0fd9c/rviz-3.log].

log file: /home/sanket/.ros/log/5e4ebc6c-c928-11e1-950f-848f69c0fd9c/rviz-3*.log

i don't know whether my rviz is missing some files or is it related to system requirements of my laptop