Problem creating new packages, error in workspace.

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Creating new packages,typing the following comand :

$ roscreate-pkg std_msgs rospy roscpp

Below The lines:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
WARNING: current working directory is not on ROS_PACKAGE_PATH!
Please update your ROS_PACKAGE_PATH environment variable.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Created package directory /home/iohan/rosws_tutorial/test
Created include directory /home/iohan/rosws_tutorial/test/include/test
Created cpp source directory /home/iohan/rosws_tutorial/test/src
Created package file /home/iohan/rosws_tutorial/test/Makefile
Created package file /home/iohan/rosws_tutorial/test/manifest.xml
Created package file /home/iohan/rosws_tutorial/test/CMakeLists.txt
Created package file /home/iohan/rosws_tutorial/test/mainpage.dox

Please edit test/manifest.xml and mainpage.dox to finish creating your package

So,I think the problem is in the creation the my workspace, but I followed all steps the tutorial http://www.ros.org/wiki/fuerte/Installation/Overlays, I'm with errors the creation the my workspace.