[odb-users] ERROR 1044 (42000): Access denied for user ''@'localhost' to database

[378549984]

Hello,I've installed all those libraries needed, and configured the odb-example-2.3.0 successfully on my Ubuntu12.04. But when I want to run next command"make check",it came out to be an ERROR: 


ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'odb_test'
FAIL: ../tester



When I searched this online,some articles said it's because the MySQL has an empty user "root" for the database,I did update the table "user" int the database "mysql" by commands:


mysql>use mysql;
……
mysql>update user set password=password('newpwd') WHERE User='root'; 
mysql>flush privileges;



But after all of this,this ERROR just still exists,so I send this mail and hope that someone could give me a reply.
Thank you.