Possible to set up new Belkin wirless router with old ntl:home 120 cable modem?

[slicendice]

Hi everyone
My g/f's parents have an old ntl:home 120 broadband modem that is connected to their PC (also old!) via USB. It all works fine but we need to add wireless capability. I've got a basic Belkin 54G wireless router that I was going to use but I'm not sure if/how this can be set up.

The 120 modem does have an Ethernet connection on the back, but the PC does not - it only has USB connection. Is it possible to use this configuration? Or would I have to install a network card into the PC in order for it to work?

I've tried hooking up the router to the Ethernet port on the modem, but to no avail. The modem and wireless lights on the router are lit up, but the internet light is not. I guess I somehow need to connect to the router to configure it, but I'm not sure how to do this given that the PC is connected to the modem via USB.

So basically the config is:

modem---(USB)-----> PC
|
---------(RJ45)-----> Belkin router

Not sure if that makes much sense, but any ideas/help would be hugely appreciated.

Thanks very much

[DocDutch]

what windows system is on the ancient pc as you said no ethernet connection on it?

the setup itself is easy...just power off the modem and connect it to the belkin via ethernet, keep an eye on the lights and it should say connected within 30 seconds.

[slicendice]

Thanks Doc
Sorry, should have mentioned....it's Windows XP, so not too ancient! Just slow...

OK, if I power everything off then switch on router, modem then PC, I can get the "internet" light on the router to light up. However, when I do this, the internet no longer works on the PC.

I have a laptop which can see the router, however it's not possible to do anything with it. It comes up with the config options when I try and connect, but then it gets stuck and the config fails...

Do I have to do anything with DHCP settings or anything like that, now that the router is connected?