Originally posted by thenewbigmack
My NAT is open and I just made sure that the filter is set to Default. It definitely has to do with the fact both ps3's are on the same network at the same time.
I know people that have 2 ps3s on the same network, and it works fine for them.
Unless your network is horrible, it shouldn't be 2 ps3s being the problem.
Maybe you should just play split-screen with each other.