Hi Ainna,
I would recommend deleting all your FluxCP files, and re-inserting a fresh copy. Then go into your SQL database, make sure all the 'cp_*' tables are dropped and do not exist in your RO database.
After that, edit the '/config/error.php' to true for error reporting.
Edit the '/config/application.php' to have the correct location and server name.
Edit the '/config/servers.php' to have the correct MySQL information, also whether you're using MD5 or not.
Then visit your FluxCP via browser, set all necessary permissions if it states it; and then proceed to install. It should work.