Upgraded my boxes a couple weeks ago. Fancy main box activated; works fine. 3 other boxes all identical with identical remotes. Only one of those three can access On Demand. On the other two boxes, I select my show. It looks like it's loading, and then it just bounces back to the menu with no error msg. And I don't get my show. Doesn't matter if it's HD or SD. I can get the show on the main box and one other box, why not the other two? Wha' happened?