In 99% of cases this will occur because the user has mistyped the username or the password wrong, no matter how hard they complain that they didn't. Get them to delete the username and the password and retype them. If necessary get them to practice typing the password in Notepad where it won't appear as asterisks and see do they get something different.
If that doesn't work, try deleting the *.pwl files
Error 691, 691 DUN Errors691, Error, DUN Error 691Error 691 DUN Errors |