How to set "http" module in PhpMyAdmin of localhost?

[majiguang]

When I use PhpMyAdmin to administrate mysql database,I hope to login with username and password.

I set my mysql's username and password,then I modified config.inc.php file as "$...[AuthType]='http' ".

when I enter IE browser as "http://localhost/PhpMyAdmin/",

Presented login box,need to input username,password and domain,
I input username and password,typed "localhost" in domain box.After that. I can not login to PhpMyAdmin Page.

Help me !