New Base URL is not working I have a site "damo1.com" now I want to use my drupal site in "damo.com", so I just change $base_url in sites/default/settings.php. And I still can see my homepage very good, but I cannot check the others views or access to the site as user.

Do I need to do one more step? Thx
In your sites/default/settings.php file, comment the $base_url line, you don't need to specify one, Drupal can do it for you.
In your .htaccess, uncomment RewriteEngine on
In the same file, RewriteBase / must be  also uncommented, and if your website is hosted under a subfolder of your root web folder, you must specify your folder  here. Eg: RewriteBase /subfolder/
Activate clean URL's in admin/config/search/clean-urls
In apache httpd.conf file, check if mod_rewrite is enabled