Cannot connect to internet

Hello,
I have installed Windows XP Pro SP3. I have installed the drivers and everything works correctly and fast except for the wireless internet. When I start up, the computer will tell me that is has detected available wireless networks but when I click on the bubble, nothing will show, I put refresh network list and it finds no networks. I then close the window and the bubble tells me there are available networks and again when I click in it tells me it can't find any. I had Windows 7 before XP and got tired so uninstalled it and could connect with no problems to the wireless network. I also tried installing the drivers several times and restarting but nothing will happen...
What can I do?