I'm stuck at the loading screen before the title screen even comes up. The logo in the bottom right corner continues to move (that weaving-lacing thing) and it won't progress. My NAT is set to OPEN, all other Xbox Live functions work, and friends can invite me to games, I just can't get past the black loading screen. There is no error code. I have already turned the Xbox off and on, disconnected and reconnected the router, and I'm using an Ethernet cable to connect directly to said router.