Can't get wireless to work

I have recently reinstalled xp on my dell inspiron 8600 laptop and I can not get wireless to work. It was working before this, I have checked my bios and all seems ok but it is not showing as installed.
 
Use the device manager to find [+] network adapters; expand that entry and both the NIC and wifi adapters should be there - - is it marked yellow or red?
 
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