Guys have a little bit of an issue with my ps3. I have 2 ps3's in the house, one for myself, and one for my sister. We both play: Dead Island Riptide together. As you might know, this is a co op game online. I have no problems connecting with outside people but when I want to connect with my sister in the same house (using the same internet), it only works 10-20% of the time; most of the times it says we are unable to join a game together. Any solution to solve this?