When watching shows from my itunes with apple tv I can watch one show, but as soon as I try and watch a second it won't load.

I just got my first apple tv. It streams netflix beautifully and connected to my network and computer quickly. Currently the bulk of my itunes library is on a PC, so I am attempting to stream from that. I can watch a show or an episode of a tv show just fine, but when I try and watch the second I get the spinning wheel and nothing loads. If I reset my apple tv and then turn home sharing off and on again I can watch another episode. I disabled my firewall and my anti virus on my desktop to see if that was the problem, still I am watching one episode at a time. HELP!