Agree with the above.

I replaced by Netgear 834GT Modem/Router with the equivilent Netgear router.

There is a routine to setting these up too:

Turn on STB or Modem and wait 2 mins
plug into router and switch on, wait 2 mins.
Plug ethernet cable into router and test connectivity
setup wireless on router and test
setup security on router (as long as no security wireless works)