Toshiba Laptop Wifi not working

Question

HiI have a Toshiba Satellite L300-07R and it came with Vista. I downgraded it to XP Pro, and made sure all the drivers were available b4 i downgraded.Everything works fine EXCEPT the wireless. I cant connect to the internet except with an ethernet wire in my laptop. I try to connect using Toshiba Configfree, but it says ''Please turn on the wireless device''.Ive got a dual core processor, 200GB HDD.PLEASE HELP ME