WIfi Radio disabled of my laptop how turn on.

Hello,
i have NEC versapro va11j laptop. problem is I have internal wireless lan card in my laptop. but icon in taskbar shows that radio disabled for your network adapter. there is no visible network adapter button on outer side of laptop nor inside I checked. how to turn on it. please help me . note: wireless lan card is ok and it shows device working properly in device manager with updated drivers.