Xp won't connect to wpa2-psk security enabled network

I have 3 laptops, 2 with win 7 premium and 1 with xp home edition, the win 7's will connect to the internet fine...but the xp won't connect at all, now if I turn off the security xp will connect fine, can anyone tell me what my problem is please? 
Thank you Kindly for any help

1. Make sure, you verify under "Preferred Networks" click on the connection that's not working, click properties.  
Verify WPA2 is an option in "Authentication".  If it's not download the latest drivers for your wireless adapter, restart computer and check again.
2. Next problem is XP's Wireless Lan Manager; it is absolute garbage on XP for WPA2.  I have seen many XP SP3 unable to connect to WPA2 because of this.  You need to use the wireless manager that comes with your wireless adapter drivers.  When
you install them opt to install with the software, not just the driver.
Supreme Master of XP

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