I'm not 100% up on the hg533 - is that a talktalk router?
However looking at what you are trying to do it looks as if you are trying to configure the hg533 as an access point.
First off give it a static address using the same IP range as the Superhub. I use 192.168.0.254. This makes for easier configuration of the hg533 once all is up and running.
Turn off dhcp on the hg533.
If it gives you the ability to set gateway and dns set both of these to 192.168.0.1, however iIIRC it shouldn't be necessary.
Attach one of the LAN ports of the Superhub to one of the LAN ports of the hg533 NOT the Fibre port.
In this configuration the hg533 is actually working as an access point rather than a router so all communications are taking place over Layer 2 with the hg533 being invisible unless you specifically connect to it's IP address to reconfigure it.
Alternatively you could try putting the Superhub into modem only mode and attaching the hg533 in normal mode to port 1 once you've done this.
Remember to power down the Superhub and and hg533 once youve changed mode and connected everything up.