Expanded args ['xv_11_laser_driver'] to: [] when following http://www.ros.org/wiki/xv_11_laser_driver/Tutorials/Running%20the%20XV-11%20Node

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Hi All,

As a beginner, followed the instructions on http://www.ros.org/wiki/xv_11_laser_driver/Tutorials/Running%20the%20XV-11%20Node to install xv_11 drivers for Neato laser (for beginners, as is marked). When arriving at step 4, getting into trouble :

~/cwru-ros-pkg$ rosmake --rosdep-install xv_11_laser_driver [ rosmake ] Packages requested are: ['xv_11_laser_driver']
[ rosmake ] Logging to directory/home/user/.ros/rosmake/rosmake_output-20111208-221941
[ rosmake ] Expanded args ['xv_11_laser_driver'] to: []
[ rosmake ] WARNING: The following args could not be parsed as stacks or packages: ['xv_11_laser_driver']
[ rosmake ] ERROR: No arguments could be parsed into valid package or stack names.

is this cwru-ros-pkg broken? Or am I doing something else wrong ? (note using cturtle : echo $ROS_ROOT gives /opt/ros/cturtle/ros $ROS_PACKAGE_PATH gives /home/user/cwru-ros-pkg/cwru-ros-pkg:/opt/ros/cturtle/stacks:/opt/ros/diamondback/stacks

Thx for any help !

Grtz, Mvp,