[691] Access denied because username and/or password is invalid on the domain.

• The username and/or password are incorrect
• Access Number is having a problem
• Credit card information is incorrect which means your account most likely has been suspended
• Your account has been suspended
• You have Required Encrypted Password Checked

Username/Password:

1. If you know your Username/Password Enter the information again! make sure it is an Uppercase Character if it HAS to be, and Lowercase if it HAS to be. (e.g. Abc is different from aBc)

Access Number is having a problem

• Try a different Access number, or a 1800# if your ISP has one.

Required Encrypted Password Checked?

• Click on MY COMPUTER > Dial-Up Networking > Right-Click on your *ISP's connection, and select Properties
•  Click on Server Types, MOST ISP's ONLY need the check mark in Enable Software Compression and TCP/IP if you have a check in Required Encrypted Password that could cause the error, might want to uncheck it, and try again, if not try the next

Call your *ISP's Help line (Billing is best) and see if your account is suspended,  or if the credit card is invalid (which would make your account suspended. If not, try again at a later time, or since you are on the phone, why not have them transfer you to Tech Support for your *ISP