Error 691: Access denied because username and/or password is invalid on the domain.
Resolution:
1) Verify the logon ID and password are correct.
2) Make sure the Include Windows logon domain check box is unchecked in the Options tab of the dial-up connection's Properties dialog box.
3) Make sure the dial-up connection's security option is correctly configured to use the Require secured password setting.
4) Delete all of the *.pwl files and reboot if you are using win9x.
5) Try another logon ID or create a new Logon ID because the profile may be damaged.
This is a simple authentication error. Please make sure that you use the correct username and password. You might also get this error, if you try to log into the same VPN server more than once at the same time. If you suspect that someone else may be using your account, Contact Us to change your account password.