To prevent clients from getting an obsolete copy of the active file, the server refuses connections to it, normally for five to ten minutes. When the new active file is built, the server allows connections once again. Be sure that you have not selected an authentication protocol in your dialer software. Some ISP's do not use authentication. Check that your username and password are entered correctly.
Most servers are case sensitive.
Usernames and passwords must match, letter for letter, case for case. One common error is typing the username in caps, when it may, in fact, be all lower case or a combination of both. Check that your username and password are entered correctly. Again, most servers are case sensitive. Usernames and passwords must match, letter for letter, case for case.