A friend and I keep trying to play in a party against each other. We keep getting the error message, no matter who invites who. We get the invites, but they never work. I am connected through ethernet, and he has tried to join using the Vita and the PS3. My internet connection is perfect, and we have both played online against random people, but it wont let us play against each other. Is anyone else having this problem?? Please help.