This is directly related to http://www.experts-exchange.com/Software/Server_Software/Content_Management/WebBased_CMS/Joomla/Q_27835271.html
I am an experienced web developer with ZERO joomla experience.
I have inherited a joomla site (that also has a custom backend with custom coded php and another (MySQL) database.
I am trying to move the hosting from a shared server to a managed server.
As discussed in the referenced question, I have copied the entire joomla database & put it on the new server as a new MySQL database; I have modified the configuration.php file on the new server so it points to the new database.
I have "run" the site; it looks fine. The customer has reviewed it & says it looks fine. Since I understand that the site content in Joomla is in the Joomla MySQL database, I assume that means the database is OK.
But when I go to mysite.biz/administrator on the NEW server, I cannot log in with the login (UserID & password) that work on the old system.
Is something else required in configuration.php?