Since you have R30 firmware I strongly recommend you use modem only mode with your own router. That's what I do and its been rock sold!
In my opinion, the superhub is not fit for use as a wireless router!
For more info about modem only mode have a look at:
http://help.virginmedia.com/system/v...8-A33A9F291FA1
http://help.virginmedia.com/system/v...4-14274804A4F5