Thank to Andreas - Ahjah I noticed that the site was not sending email for replies on the topics in the forum nor emails for new comments for the pictures in the album. I'm very sorry about it
and I'm sorry for not having noticed it earlier. However it's not a problem related to the upgrade but something that our provider have done somewhere. However I have found a fix for it and the "sendmail" of the server. Actually I tested all the system and ot works, however if you notice something similar in the future please contact me very soon. You may also check your latest picture for new comments, they could be passed unnoticed 
