Why, did you get one of those piece of shit ROKU boxes? I had one, for exactly one day. Turns out the piece of shit was directly engineered to separate me from my cash. The first thing it wanted was a fucking credit card so they could start happily billing me even more for the device I just paid $100 for. The final straw was after digging through it and all the stupid "apps" for it you have to buy, I finally figured out the only way it would play my LOCAL MEDIA that I specifically purchased it for was to BUY A FUCKING APP to do it for $4-5 bucks. That did it.
The POS went back the next day flat, and I bought a WD-TV Live box instead. It did everything I ever wanted it to do, and it supports LOTS more a/v file formats, way more than the ROKU did. It will play .ISO DVD images directly, and understands .AVI, .MPG, .MP4, .MKV and whole host of other formats. The WD-TV Live was one of the best purchases I have made in the last few years. ROKU sucks donkey balls. Maybe they fixed this in later software upgrades, but somehow I doubt it, as I said it seemed engineered to drain my wallet, primarily...