This attribute defines the reason for the failure of an operation.
Value = 1: Invalid mode/state
Value = 2: Station not authenticated.
Value = 3: Internal error
Value = 4: Out of sequence frame
Value = 5: Un-supportd algorithm
Value = 6: Invalid frame length
Value = 7: WEP is required on the AP
Value = 8: WEP not allowed
Value = 9: Challenge text mismatch