Scattered mind while doing Body Scanning in Vipassana
I have read some suggestions for this like having the perception of light, walking meditation etc. but none of these are helping me out. I would be very grateful if someone could point out my mistakes and give some advise to overcome this.


Interesting, because I was just about to suggest the same when I read your post saying it doesn't work for you.  

When I walk meditation, I have the same problem as you and I deal with it by simply noting the length of the distraction. I don't fight it. I simply say, "oh I was distracted for a block." Or I say, "I was distracted for a mile."

This sounds so simple and so silly, right?

But it works because what happens is that you will find that the distractions decrease in length over days and weeks. This is exactly the same approach taken for noting the length of breathing: "this is a long breath" and "this is a short breath".  The breath becomes longer on its own without any struggle or grasping.

Similarly, notice that you are "scanning the body" or that you are "distracted from scanning the body". Just be aware. I counted my breath for decades. That is only the first step!  Just be mindful and aware of what is happening. It is not a race. Be gentle and mindful.