Whilst not having used that router, can you access the setup/config/status page on the router and see if is acquiring an IP address? It sounds like its not.
bypass the router, put your laptop directly through the NTL modem, open a dos prompt and run ipconfig, and you'll see the ip. Disconnect, plug your router into the modem, conncet wirelessly to the router and if the router is set up right the router should then acquire the same ip address, AFAIR NTL have an addess like 83.XX.XX.XX or similar.
note: If you run ipconfig on a dos prompt while connected wirelessly you should only be getting an address like 192.168.1.XX which is your internal network ip assigned from the router.
let us know