I solved the problem for which i needed to reinstall my system => in order to use log activity in KUBUNTU sugar emulator, i also needed to install gnome-python2 package. But i am always interested in the answer just for my knowledge :) Regards <div class="gmail_quote">2011/5/26 laurent bernabe <<a href="mailto:laurent.bernabe@gmail.com">laurent.bernabe@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Hello, i need to reinstall my system, and switching from Kubuntu 11.04 to Ubuntu 11.04 => i will loose my developpment folder and its git configuration. Will i be able to commit again the project LearningWriting.Activity if i put back private key in the good folder ? Apologizes if my question is bad told ? (And excuse me for my poor english) Regards </blockquote></div>