Notice
I found that those domains that the statistics still works fine has in Hostlaies label two declares
HostAliases="www.domain.com and domain.com"
Other domains that they don't have both declares (has only the second) did not working.
I tried to fix changing the conf file in plesk bin directory for every domain (!!!!) manualy but the plesk overwrite this setting again. Is there any solution for that ? We need some help here but as i can see there are no comments from Plesk's company? Very nice support !!!! We decide to stop buying updates because every time that we need to upgrade to a new version we have many, many problems and no answers/solution to our problems.