hi
your server is iis or linux?
then your provider have to do setting for you
and
reset the all setting
login to your cms
now Click the MySQL Database Wizard under the Databases heading
then
Next to New Database enter a name for your database and click Next Step
now press Next to usrname enter a username.Enter a password next to password, enter it again for password (Again) and then click create User
now.............On the next page, you'll assign privileges for the user to the database. check the box next to all privileges and then click nextstep
good luck