Unable to load sample extensions

[Vamsi Krishna Brahmajosyula <vamsikrishna brahmajosyula gmail com>]

Hello,

I was trying to install and run the example extension on gnome shell (gnome 3/ Fedora 15 )

I followed http://live.gnome.org/GnomeShell/Extensions

Looking glass shows "ReferenceError: Shell is not defined" 

even gnome-shell --create-extension did not work for me.

Let me know if i am missing something. 


Thanks.