I sent a new application today. It is expected to be deleivered on May 1st, 2013.
NB: I submitted an application on Nov. 2012. The work experience ref. letters were not similar to the NOC leading statement and duities. And several members on the forum submitted updated letters to be attached to their applications, the letters were considered, however, the applications were rejected. This means my first application may be rejected, even if I submit new ref. letters. The new system that begin on May 4th, requires more and more preparation. To be on the safe side and to get the PR eariler, I sent a new application.
Thank you all. I found this forum very useful.