Thank's jan_c I put it in my polish forum - LINK

I don't know graphic interface from W8961ND, so give a screenshot from your configuration. We'll see those settings.

In my opinion better solution for TP-link is Gargoyle. I have WDR4300-gargoyle in my home network a I'm very happy. This is link for Gargoyle simulator, you can check this GUI. The latest version is...

You can use Management Utility application.

You make test for short distance and button "Pair"

Maybe this is problem with DNS on TV. Router has problem with DNS translation.