===========>set_swcam():EntryNo is 2,KeyIndex is 2,KeyType is 4,is_mesh is 0
==========>received disassoc/deauth(c0) frame, reason code:2
notify_wx_assoc_event(): Tell user space disconnected
It looks like the access point doesnt like something about the card and it disconnects it.
The wireless network seem to be running at N speed, can you turn it down to g speed and see if it will work.
A solution could be changing network parameters of the interface like rate speed, somebody already suggested this but they lower it to 54, lowering it further if you can
somebody else in the below link seem to have the same problem you have, they didnt get a solution though but you arent alone in this problem.
http://ubuntuforums.org/archive/index.php/t-1704960.html