Serial not valid errors

The reason behind it is that most probably: - You have a different $mosConfig_live_site than the domain you have confirmed in your joomla/mambo configuration.php file (also available through server tab in admin backend configuration section). Example: ERROR: Your $mosConfig_live_site = www.mydomain.com Your Confirmed Domain = sub.mydomain.com ERROR: Your $mosConfig_live_site = sub.mydomain.com Your Confirmed Domain = www.mydomain.com ERROR: Your $mosConfig_live_site = www.mydomain.com Your Confirmed Domain = www.anotherdomain.com OK: Your $mosConfig_live_site = www.mydomain.com Your Confirmed Domain = mydomain.com OK: Your $mosConfig_live_site = mydomain.com Your Confirmed Domain = www.mydomain.com OK: Your $mosConfig_live_site = www.mydomain.com Your Confirmed Domain = www.mydomain.com OK: Your $mosConfig_live_site = test.mydomain.com Your Confirmed Domain = mydomain.com OK: Your $mosConfig_live_site = demo.mydomain.com Your Confirmed Domain = mydomain.com If so please open a ticket and let us know to change it.