Plesk Windows 2003 - One website asking for password

This post is actually associated with the last post I made. But instead of editing the last post, I decided to go with a new post, since the issue happened before. After I change the password of an account, website on accessing on a browser, keeps on asking for username and password. It can be fixed by executing the following command from the cd %plesk_bin% directory.

websrvmng --update-anon-password --domain-name=domainname.com