bb2010:Click your thumbsticks in, then try to press the buttons.  Most likely they aren't centered, it has nothing to do with the DLC. 

Unfortunately I've already tried that, but it has no effect- by the way i can use campaign and AI skirmish, just not the multiplayer...

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the arbiters will is done
Until someone pays me more, long live the arbiter!

offensive bias:

ARBITER, trust me here, he won't do it.