Re: PLEASE HELP URGENT: CAN'T PLAY DLC OTHER THAN ENDGAME

It sounds like your previous expansion data has been corrupted.  Re-download the online pass and previous DLC to your console by opening the PSN Store and on the left hand side second from the bottom click on "view downloads".  Scroll through your purchases until you find your online pass, your premium file, and all DLC\expansions that you've purchased for BF3 and click download for each one.

After the expansions download go to the games portion of the XMB and click on each expansion's bubble to install the game.  After each expansion has been fully downloaded and installed restart BF3.  At this point you will receive a series of pop ups stating that you now have each expansion.  Now from the main menu go to multiplayer, open server browser and then open the server browser filter by clicking R3 and check all new maps and game modes or you won't find any games on the new expansions.