I remember the good old days of taking a powerline adapter with it's twin, plug it into an outlet, go plug the other into another outlet and there you go.  I guess that should show my age hu?

I have two model's.  One is TL-PA 7017 I guess it's a kit as I got two adapters and the other is a TL-PA 7017P.  Here's the story/problem.  So I got the 1st set TL-PA 7017P.  Plug it into an outlet in the office, which the cable goes from the unit to router.  The other unit that came with it, is plug in a room with the cable going out to my barn with cameras (hooked up to a DVR).  Easy as pie.  I was happy.  The the wife said "I want to watch TV in my women's cave.  I said, NO Problem!  I was wrong.  So I order the TL-PA 7017 (KIT), receive them today.  So I plug one into my switch  is is run by my router, and the other into room with her TV, and the other into a switch (same switch as the first one).  Once I did that, all my security camera's when down.  Once I unplug the one plug into her TV, security cameras came back on.  

Why is this?