Oh Howard, I can't thank you enough! I didn't even know what that was and you sent me in the right direction. I checked the documentation and I add the password salt from the old config.php to the new one.
It works like a charm. Thank you very much!! Shoud I add something else to the code or that's it?
(Edited by Helen Foster to remove the specified password salt just in case - original submission Tuesday, 9 June 2015, 11:35 AM)