TV,
The chances are that the Netgear Router doesn't yet know about Netcomm. There's a sequence of events that go on at the start of day:
Your Netcomm box talks to ISP Central and between them they make sue that you are who you say you are. Part of that process (if your ISP works like ours) is that the Netcomm looks for the Desktop machine that was originally plugged into it using some data hardwired into your desktop (called the MAC address), sort of "Desktop, are you there?" and the desktop would reply "Yes".
I suspect this is so because that would also explain why the laptop didn't work when it was plugged in.
Now you have plugged in the Netgear - so the Netcomm wakes up, says "Desktop, are you there?" And the Netgear says "No it's me, Netgear" so all stops.
As you have it now, your Desktop system is plugged into your Netgear router, so you should be able to open the Internet Browser on the desktop and type the address for the router (
http://192.168.0.1 if my memory serves me) - it will be in the documentation - and then you'll see the various setup options.
There should be an option in the Netgear router which says "Copy the desktop data - the MAC address - to the Netgear router" which you need to do.
Once this is done, then next time everything starts up the Netcomm comes up and says "Desktop, are you there?" and the Netgear will say "Er...yes...it's me...Desktop" (In a similar vein to a husband when asked "You have remembered our anniversary?". Answer: "Er...yes...")
After that, you should find that both the Desktop & The lappy work with the Netgear.
Summary here is that your next action is to run the browser on teh desktop to connect to the Netgear & force it to spoof the desktop address to the Necomm. The user guide that comes with the Netgear should talk you through it.