Both are the in 'static' ranges for VM Business, so it depends which they have assigned to your account. Do you have a login ID you have to enter into he business section of the Superhub? I don't mean to access it's web interface - but when you get into that in the business settings?
This is the account that the SH uses to connect with VMB systems to form your PPP/L2TP tunnel to map the static IP addresses to the SH.
If this wasn't setup correctly to start with I suspect the SH IP isn't fixed at the moment.
If you connect a PC to one of the superhub Ethernet ports and ensure DHCP is enabled on the PC do you get a 192.168.x.x address?
If so visit
http://whatsmyip.org to see what public address you have.
Also check the SH interface in the business section for a login & password - both should have been given to you when you setup your account. The engineer can get them for you, as can support.