connecting laptop to network wirelessly

i have been trying to connect my mothers laptop to my network and i cant get it to connect. it sees the network but it wont connect. how can i fix this?

her computer specs
dell inspiron 1000 running windows xp with a dell wireless 1350 WLAN PC Card

my network router : netgear WGT624

anything you need to know, tell me and ill do my best to get the info for you

 

Have you disabled the Windows (or any other) firewall on your mom's PC?

Is your network encrypted? When you click on connect, do you get no response or do you get a message asking for a password or do you get some other message?

Have you managed to configure any other PC to connect to your network wirelessly? And if you have, can you use its settings as a guideline?

Hope this gives you a few ideas, at least.