Your provider has the obligation of offers you support about this. Anyway, in order to work, phpMyAdmin needs a properly set up MySQL-user who can read/write (your provider gives you one). Open your config.inc.php3 in your favourite editor and change the values for host, user and password to fit your environment. Then put the all files in some folder in your root folder and that's it. If is a shared server, perhaps it shows you all the databases in the server, but the only one you can modify it's yours. Ok, I have the same problem with my provider
Jorge