Beginner's question: phpmyadmin cannot be logged on

Cainiao Q: phpmyadmin cannot log on to phpmyadmin (2.10.3) with the root account or the password set when appserv2.6.0 is installed. you can log on with this password in MySQLCommandLineClient. In phpmyadmin, no matter what Cainiao asks: phpmyadmin cannot log on
You cannot log on to phpmyadmin (2.10.3) with the root account and the password set during appserv2.6.0 installation. you can log on with this password in the MySQL Command Line Client.
In phpmyadmin, no matter what user name you use, you only need to add "\" and do not need a password to log on, but you do not have the permission to create a database.
How can I log on with the root user name and password, and have the permission to create a database? modifying the config. inc. php and config. default. php methods on the Internet is ineffective.
Solution

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Error message. You do not have the permission to create a database. you may not log on as a root user.
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The Root user authorizes him.
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It should be an old version or the program itself has a problem! Phpmyadmin (2.10.3) is now commonly used in versions above 3. how can I still use 2 generations?
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I can't do it. please try again later ~
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Reinstall phpmyadmin.