Activate Bluetooth Using Wireless Switch (Dell Vostro 1550)

Hi,

I have Del vostro 1550 model, recently I have formatted my laptop & installed window 7.

When I try to install Wifi+bluetooth driver , I got following messge

Activate Bluetooth using wireless switch.

i have read somewhere to enable bluetooth in bios .. I go to bios by but there is no option available.

Please help me, this is very urgent.

-Sanjeev