Error 691 - Access denied because username and/or password is invalid on the domain
This problem tends to be a problem during the authentication process.

 

• The main reason for this is an incorrect username or password. Bear in mind these are both case-sensitive and the username must be lower case.
   
• Make sure you are dialling the correct dial-up number. NOTE: NTL accounts will not accept the 1470 prefix.
   
• Check your connection settings to ensure that SpeedTouch Connection is set to default and the following settings are NOT selected: LAN settings, automatic configuration script and proxy server.
   
   
  
   
• Check that the connection settings have been set to Security setting typical to allow unsecured password. The only networking protocol required her is TCP/IP and ensure that Internet Connection Sharing has not been enabled
   
   
  
   
• Make sure logon to network is not selected
   
• Recreate the dial-up connection as indicated HERE
   
• Ensure no firewall modification or software updates have occurred since receiving the problem