Diggit Drupalextras

Hello all,
I register free host on byethost.com. I go to cpanel.byethost.com and created database on mysql database. The database name is b17_9059257_mydb, so I go to phpmyadmin and import mydb.sql. The MySQL said: #1046 - No database selected. I go to database menu in phpmyadmin and create a database. The mysql message: #1007 - Can't create database 'b17_9059257_mydb'; database exists. I created new database (b17_9059257_mysql1. The mysql message: #1044 - Access denied for user 'b17_9059257'@'%' to database 'b17_9059257_mydb1'. Then I go to sql menu create database by query: "create database aaa;" The mysql message: #1044 - Access denied for user 'b17_9059257'@'%' to database 'aaa'.
I search error on google and other forums. I was tried test, but not ok.
Please help me,
Thanks very much.