Whenever i play games like Call of Duty black ops or Killzone 3 i get disconnected after about 30 seconds of being in the game online or in killzone sometimes doesnt even join. It sais check your network/you got signed out of network(something along those lines). But im still signed in on PSN!! It makes no sence! All my friends are playing but i cant. I disabled media server, im connected to my modem so i dont need to open ports, i called sony and my internet service provider but they just blamed eachother. My computer internet works perfectly fine. Please help i want to play online.