I am trying to set up my Roku remote so that, in addition to controlling my Roku, it can also control my Hisense Fire TV. I have a different Roku remote for a different Roku that works with the Hisense TV but it belongs to my son. That remote worked with code 13. With my Roku remote, I can only go up to code 7, at which point it no longer continues the pairing process. Any assistance with this would be welcome.