Hello, Thank you for your reply. I tried your suggestion. However, I encounter some problems. Following your suggestion, I exported all the database through phmyadmin. Then I created a new database through "MySQL Databases" and assigned the user name to it. After that, I tried to import the edited dump to the new database. However, I can't import the edited dump. The error message was like: #1007 - Can't create database 'XXXX (database name)'; database exists. Since I can't import the edited sql file that contains the database name already exited, I tried to create this new database through "phpmyadmin" by importing a new database. So, I exported a single database through "phpmyadmin". And then, I deleted all the databases through "MySQL Databases". I edited the the exported dump and changed the database name to a new name I want to create. OK. I succeed to create a new database. I also successfully created the imported database in "MySQL Databases" and assigned the user name to it. Finally, I changed the database name in configuration.php. However, I can't still access my website. The error message is still the same: "Error displaying the error page: Application Instantiation Error". I don't know why. Is my way wrong? Another question. Even though I delete a database through "MYSQL Databases", the database name still appear in the "phpmyadmin". How can I delete it? Does this cause the website problem? or other reasons? Please let me know how to solve this problem. Thank you very much! CCW