NTL + STB Live Problem

[thund3r]

hi there, ive have just reciently perchaced xbox live, and for some reason it worked fine for a while, but now its just nor working at all. Ive looked through FAQ's on the site and xbox live works when i plug my ethernet cable (internet connecion) strait into my xbox if i clone my mac address, but i want it on my network. At the moment my pc is the host for my network and the other 2 computers share the internet connection. my set top box is plugged in downstairs and is wired from that to the back of my pc via usb then shared to the hub via network card.
Ive hurd theres problems with set top boxes and xbox live, could someone guide me in the right direction?

cheers

James "thund3r" Perrow

[thund3r]

hmm thats wierd i can get on now and then. i think something to do with my pc.