A statement from Rockstar advises, "The Xbox 360 version of Midnight Club: Los Angeles South Central, set to release on Xbox LIVE and PlayStation Network today, has not yet gone live on Xbox LIVE due to an unforeseen bug in the title update.
"We are currently working as quickly as we can to resolve this issue, and we will notify everyone as soon as the DLC is made available. Thank you for understanding and your patience. Please note that this issue does not affect the DLC on the PlayStation Network – it is currently live and available for download."