Password protected sites

In FAQ I read next:

Requesting Password-protected Web/FTP sites
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
User authentication support for password-protected sites is also available
by www4mail.  To access such Web site/pages conforming to the pattern
`protocol://username:password@site/directory' you need to know (and then
pass on) the correct USERNAME and PASSWORD.

In these cases send an e-mail

           To:  www4mail@wm.ictp.trieste.it
      Subject:          (... whatever you like)

and write in the body of the e-mail:

      http://username:password@site/path
or
      ftp://username:password@site/path

where site/path is the machine,domain,directory,file you want to retrieve
and the @-sign is used to separate the string `username:password' from the
site/path.


I use next line

http://mylogin:mypassword@ccnow.com/login/ and
http://mylogin:mypassword@www.amexmail.com/ but I get page
www.ccnow.com/login/ and www.amexmail.com - not into my account. Why?

Best wishes
Michael