I hav installed mac os lion on my MBP 2011 model but it is telling me no wifi hard ware installed what do i do pls suggest me sumthing

i hav installed mac os lion on my MBP 2011 model but it is telling me no wifi hard ware installed what do i do pls suggest me sumthing
so i cannot select my wifi or anything
please tell me what do i do
when i open network prefrences it shows
when i click on "turn on wifi" nothing happens
i have even done a apple hard ware test but it says everything is alright
i am really tensed what do i do pls help me

If AHT doesn't show any issues, your best bet would probably be to take it to the Apple Store. The AirPort (Wi-Fi) card may have been unseated from its original position. If there is a problem with the card Apple should be able to replace it for free.

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