Hi Mohamed,
I am sorry for the inconvenience. Could you please clarify - you are still able to post new topics but you are not able to comment on existing threads? Are you logged into your oDesk account when you try to comment?
I have checked your status as a Community member and made sure it is "active." If the issue still persists please send a ticket to
Customer Support so the issue gets escalated to our Engineering Team.
Thank you,
~ Valeria