i have a wireless lan network set up and after a reinstall of xp it now seems to think that the wireless network is not working, the card and drivers are all working properly but xp wont find the network
Make sure the name of the Workgroup and the name of the computer (on which XP has been reinstalled) has not been changed. Right click My Computer, Properties, Network Identification tab, and check the names.
If you can't remember whether the names have been changed, you might try reconfiguring the network.
Try disabling any firewall (for the time being) to see if it makes any difference.