I cant get the alexa roku app to find any devices. But when i go to roku app it shows both devices. But still cant find thru the alexa app. Bought a tcl 50" roku tv thru Amazon because it said it works with alexa. Person needing this has limited eye sight and motor control but can speak just fine. The bigger tv has made it easier to see but we would like to be able to control thru Alexa for them to be able to use. Remote control use has not worked with them, yes we tried. Please help so i can get this set up for them.