can't add network passphrase

I've got an old laptop with XP and a Netgear wireless card. The card is installed and working, but when I click on a network, it says that it's password protected (it's my home network) but there is no way to add the password. I've right-clicked and searched other settings.

I have another old laptop and I remember it having Netgear software for mananging networks, which I can't find right now on the netgear site.

Any thoughts or suggestions?