Connect to Arris SB8200

I used to be able to connect to my Arris SB8200 cable modem.  Now, I get the login screen.  None of the default user/password I know of works.  Does anyone know how to login to the cable modem.  I recently updated to a new DoublePlay package.  I'm anticipating Xfinity sent an updated packet to my modem to that effect.

Any help is appreciated.

Thanks,

Alex