Forum:Underdome problem

Ok so i finally broke down and bought Underdome DLC i bought it for the bank, i really had no idea what, if any missions this DLC had to offer, so i did not do my homework, anyways i read that there has been a glitch that erases class mod, grenade mods, and shields, I am just wondering if anyone had any problems on the xbox Single Player, xbox GT SinsterNobody PS if anyone know how to do a backup on the xbox harddrive (can copy my BL to another profile,) i lost my mem card. Thank you in advance.