Does everything else on the remote work?
And when you say the channels won't change, do you mean with the channel up/down button, or by entering a number?
If you are typing in numbers, you may need to hit OK/Select. Non-X1 has an option for auto-complete that will change after a few seconds delay if you don't type a full 4-digit number (0007 for example) or hit OK/Select.
I just wanted to reach out to see if you were able to resolve your issue with your remote?