I noticed that you are trying to install the Slingbox in Canada and you are having difficulties selecting the correct TV provider. If you select Canada as the country were the Slingbox is installed. it will not show any of the providers from United States.
In this case what you need to do is select United States on the Setup and it will allow you to select the correct provider, since your Dish tripod receives the signal from USA. Please, access the Slingbox Setup and configure it that way.
I hope that helps!