I have spent all of today trying to fix this error after following the advice to change my admin folder name.

It has been hell and my shop is now showing the page - Cannot connect to database!!

I have ready many posts and not found a solution yet.

I have checked my php and a second EMPTY database has been created (don't know how) I think my shop may be pointing to this empty database.

After changing the name of the admin folder and following the other instructions I am unable to connect to the back office. Just get the error
ERROR: [NEWFOLDERNAME]/includes/configure.php file not found. Suggest running zc_install/index.php?

I can, however, login with the old address [admin/] as the folder is still on my server.
I have not changed the password to the DB

What can I do?