First of all, the Slingbox was not designed to control TV sets. It will allow you to access the supported TV sources features, as long as it is attached to the Slingbox.
With this in mind, I recommend you to verify the home connections and run the Configure TV sources one more time. If it does not work, you can check this thread, provided by alanrichey42.
Thank you for your reply. With the help of SlingBox, I was able to get at least a remote working. As to the main issue, thank you for providing a link, but I am not sure which of the posts from the gentleman that I was supposed to read, but none seemed applicable or at least none that came up on my screen. I am told that I cannot get it to do what I want, and if that is what it is, then that is what it has to be. If on the other hand, there was a specific post that you were referring to, I would be happy to read that.