Lost my laptop internet connection

Hi there,
Any help most appreciated please.

I am unable to connect my laptop to the internet through my home wireless network connection;

First thing to say is that the broadband network connection is fine.
This is proven by the fact that we have one family PC connected fine, and all other devices connected fine too, these include
4 other laptops and mobile phones too. So the issue is related to my laptop only.
(The internet connection is through cabled Virgin Media UK broadband, connected to a Virgin modem with a Netgear WGR614 wireless router.)

Also, my laptop connects to the internet fine using an O2 mobile dongle.

So, there is is some kind of setting on my laptop for ny home network that is wrong.

Laptop is a Sony Vaio, running Windows Vista Home Premium 32 bit.
It was working fine a few weeks ago, so not sure what's happened.

I usually connect by doing the following;
Clicking on 'Connect to a Network'
Clicking on Johnsxx (our network name)

However, the network name Johnsxx is now missing. I have tried various things to try to get it added again without success, and I am now stuck.

When I try to set it up again, it says no 'No Wireless Networks found'.
The network name Johnsxx also shows under the 'Manage wireless Network'section, so not sure what is wrong?

Many thanks in advance for your kind assistance.

Paul

Eek. You may have a bad card. How old is it?

Have you tried connecting through the cable?