If u r using Apache...

Heres the post for those using Apache as web server...

For Apache, add these lines to your httpd.conf file (if you have root access to the web server) or to your .htaccess file:

AddType text/vnd.wap.wml .wml
AddType text/x-hdml .hdml

Notice how we've added support for both WML and HDML. Although HDML is being superceded by WML, in North America most of the browsing cellphones do not yet support WML, so whenever possible try to support both.