Hi ..Thank for your information. I have try it but still cannot work. Below is my setting

.htaccess

AuthUserFile /usr/local/apache/conf/passwd

AuthName Member

Auth Type Basic

<Limit GET>

require valid-user

</Limit>  

access.conf

<Directory /usr/local/apache/html/phpMyAdmin>

AllowOverride AuthConfig

order allow,deny

allow from all

</Directory>