Glenn -
You need to understand that this is a peer-to-peer forum. We do not have access to your set-up, what equipment you have, etc. If you can tell us some of these things, perhaps someone will come along who can help you:
What is the model of the new set-top box, the old one, and why did you have it replaced?
These boxes have available via the Menu >>> Customer Support, various helpers. Which of these have you tried. and what happened?
That's a start - the ball's in your court
starrin