Unable to cast my dtek60

Hi I'm new here . I'm having an issue casting. I'm trying it for the first time and my DTEK60 won't connect to my Samsung smart tv. It's just keeps saying connecting. I thought maybe they weren't compatible but then I tried casting to my Roku box and it does the same thing. Just keeps saying connecting and never does. Do I need to enable some setting on my phone? Any help is appreciated. Thanks.

Does Samsung or Roku have an APP? might try those.

Setting for casting can be found in Settings /display /cast