how can I use sdf2rviz node?

edit

I want to use the sdf model of gazebo in ros, there is a package

http://wiki.ros.org/gazebo2rviz
http://andreasbihlmaier.github.io/2014/02/19/gazebo2rviz.html

I followed the tutorial:

1. run gazebo
2. add a gazebo model
3. run the Rviz
4. add tf and marker
5. run the roslaunch: roslaunch gazebo2rviz gazebo2rviz.launch

but I could not see the tf of models inside the Rviz.

Do you have any experience with this package?

I tried to use this command also but it does not work:

roslaunch gazebo2rviz sdf2rviz.launch model="./polaris_ranger_ev/model.sdf"

how should I launch the sdf2rviz.launch?