Enable WPA Wireless access point in Ubuntu

I have a Thoshiba laptop at home, I was running “Edgy Eft� (Ubuntu Linux 6.10) But one of the important things about it was its inability to connect to WPA-encrypted Wifi access points.In my home i have a WPA Enabled Wireless router so i need to connect to my wireless network using WPA.I am giving the procedure that worked for me to enable wpa in my toshiba laptop.This will work most of ubuntu users who is trying to access WPA network.

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