PRW.NET FAQ's : Dialup and Modems :
Why do I get a message that my username or password is invalid (Error 691) ?
1. You are entering your username or password in UPPER CASE. The username and password must be entered in lower case.
2. There is an active connection with the same username and password. Personal accounts are allowed one connection at a time so if you try to use the same account from more than one location simultaneously, the system will reject the additional connections.
3. Your account is temporarily on hold due to an open account balance.
You can call our technical support department at 787-723-5000 for assistance diagnosing this issue.
What are the dialup networking (DUN) error codes ?