Mirroring Zenpad to Roku 3

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My zenpad has "play to" option. When I click it, it shows my Roku device. I click on it and it trys to connect but fails every time. (I have an android phone with miracast that connects fine).

I am trying to troubleshoot this problem or find an alternative for my zenpad to mirror to my tv using my Roku 3.

Can anyone advise please?

 

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No ideas?