Try setting the superhub to 145mbps for stability.
Use
InSSider to help you manually optimise your wireless channel by selecting the channel that gives you the lowest RSSI value. Bear in mind the RSSI values are always minus so the best values are those closest to zero.
WPA2-PSK[AES] seems to be flavour of the month security wise.
The wireless on the superhub is notoriously weak. If you continue to have problems think about acquiring a decent router and switch the superhub to modem mode.