Co-op is not working right!

[Snow]

I was starting to play Co-op with my friend, but then we both got kicked out of the game instantly. We tried it many times and its not letting us create a game or start a game together, please fix this, its never happened before ;-;

[Scheddoc]

I have the same problem and I have NO idea how to fix this, so it seems we are both out of luck... Hopefully we can find the answer...