Start firefox extension using folder
===

I'm new to Firefox extension development. I have gone through some basic [tutorial][1]. When I do as shown in the tutorial by placing the folder into profile folder/extensions folder, or in profile folder it made no change in the extension installation after restart. 
Then, I have gone through this [tutorial][2] as well. I tried using the pointer object also. This also not working for me. 
Firefox version I'm using is 14.0.1, 
And When I try to install ESPN Crickinfo (you could be able find extension on-line) extension, It also not working. I couldn't open the options page of this extension even.
Any suggestions on this problem??? 


  [1]: https://developer.mozilla.org/en/Creating_a_status_bar_extension
  [2]: https://developer.mozilla.org/en/Building_an_Extension