[MonoDevelop] Trying to write my own add-in

[laas]

Hi all,
I'm trying to write an add-in for MD in order to simplify my work with
the IDE. I'v seen that the tutorial
http://www.monodevelop.com/Writing_an_Add-In is out of date, so I've
downloaded the source code of MD and I'm using the code of
other add-in in oder to develop mine.
When I copy my add-in in the /usr/lib/monodevelop/AddIns folder (both
addin.xml and dll) and restart Monodevelop I receive the following
messages:

WARNING: The add-in 'CodeCopy.CodeCopy,0.17.0' is trying to extend
'/MonoDevelop/Ide/OptionsDialogPanels/Other', but there isn't any
add-in defining this extension point
WARNING: The add-in 'CodeCopy.CodeCopy,0.17.0' is trying to extend
'/MonoDevelop/Ide/MainMenu/Edit', but there isn't any add-in defining
this extension point
WARNING: The add-in 'CodeCopy.CodeCopy,0.17.0' is trying to extend
'/MonoDevelop/Ide/Commands', but there isn't any add-in defining this
extension point

Where CodeCopy is the name of the AddIn.
Is there a missing step to be performed before copying files to the MD
Addins folder ?
The addin is visible through the AddIn Manager and can be
enabled/disabled, but it does not work and the custom menu item is not
available.

Kind regards,
-- 
[LAAS]
aka Salvatore
WebSite: http://www.laas02.org
YTSite: http://www.laas02.org/youtranslate