Streaming

DTV sat receivers have no inputs for a streaming devices, they are connected to the TV.

I’m using a Roku stick connected to hdmi input 

If your Roku Stick is connected to your TV's HDMI INPUT, then your DirecTV Satellite box is not involved. 

Or are you trying to use the DirecTV Stream App on your Roku Stick?  If yes, what isn't working?  And are you a DirecTV Satellite or DirecTV Stream customer?

Are you a DirecTV (satellite) or DIRECTV STREAM / DirecTV via Internet (streaming-only) subscriber?

Did you download the DirecTV app to your Roku Stick?

What happens when you try to watch? (Symptoms, error message, etc.)