Ok I live on the west coast and I was in a party with my clan. The majority of my clan are on the east coast or midwest,CST. Only a few had been having problems joining a public match, I did not. We got together in the party and tried to join a pub match, no luck. We try again, same error message. I later hear from one of my friends that this is the new matchmaking system, to prevent lag. You must be in same region to join a pub match in a party. If this is true it's stupid I mean the concept is nice but it DOESN'T WORK!