Forum:BF3 crashes when loading maps from B2K Expansion

Ive been playing BF3 on 360 for well over a year. In the past month I have had major issues when trying to play any of the Back to Karkand maps. Regardless of whether or not I choose a map from the server browser or from the quick start, if the map is from B2K, my 360 will crash. I have deleted the B2K save data from the 360 and then downloaded it again a couple times, and this issue still occurs. Im wondering if anyone else has had this issue before, and what the fix may be, if any. Its quite annoying since gulf of oman and wake island are 2 of the better maps. Thanks for the help