Yes, I was using the IP address of the unit to configure the Pandora credentials.
Update: I went to the Pandora menu from the remote and the username and password now show up. Even though the web page indicated that the information could not be saved.
However, now when I try to connect to Pandora it says "Server Error". Note that the Internet Radio app on the receiver works fine so I don't think that it is an internet/networking issue. Also, I can log into my Pandora account find from my PC and phone.