No wifi

Hello,
I was having isssue with my HPdv4000 laptop which had windows xp on at the time i was able to connect to the internet using wifi but i just recently reinstalled windows xp and sp1,sp2,sp3 though the cable modem but when i go to use the wifi i am not able to do so i used the wireless wizard did all the steps but when i was finished i was back to where i was no WIFI can anyone help me THANK YOU