Replacement TV Boxes won't work

I have a set up with three TVs hooked up to cable.  The primary box is a DVR with the identifier XG1v4-A (X1) and the other two TVs have the older XiD-P TV boxes.  The older XiD-P boxes were given to me in June by a local Xfinity Store.  However, they didn't have voice activated remotes nor could I watch recorded shows on those TVs so I went back to the store yesterday and was given new XiD-P (X1) tv boxes with the new remotes and I was told these boxes will also allow me to watch recorded shows.  The salesperson at the store was surprised I was given the old technology.  Well, the new boxes won't work.  I get through the Welcome and "connecting to my entertainment system" when I get a "Sorry" message that it can't connect.  It tells me to recheck my connections, restart, etc. which I did unsuccessfully.  I chatted with a live agent who attempted to send a signal to my new boxes and also reset my primary box.  Still nothing.  I also tried these new boxes in multiple outlets and still nothing.  Any ideas out there?  Could these boxes be incompatible with my XG1v4-A DVR box?  Thanks