Apple TV mirroring with 3rd party type websites

I purchased the appletv because I was excited about the mirroring concept. I watch some of my tv shows online via websites like "ProjectFreeTv" and "CouchTuner". I mirrored my phone to my AppleTv, pulled up a website that I usually watch thru, and all was fine, until I hit "play". The video would play on my iphone, but would not show up on the AppleTv. The television screen says "Wrong IP!". Ive tried with both of these websites, but neither will work. I thought the AppleTv was capable of mirroring all from another device?