WD my passport is not detected at windows 7 32 bit

Hello,
My Western Digital is not getting detected which was working 1 week before. Suddenly this was not detected and following is happening after connecting in my laptop (Win 7 32 bit)
a) Light appearing on the drive.
b) Hearing sound from the drive.
I have tried Disk management and Device manager solutions but it's not worked
As, my all data is in HDD it very dangerous if I loss this data.