Steam with Xbox360 pad, no vibration/rumble

Hi there!
Some time ago I played the demo of the walking dead on my PS3: it was love at first sight and with the (now gone) humble weekly bundle I really had to get it.

I had some issues with the game not booting related to my xbox wired pad connected, which I solved with the help of this post:

As far as I remember my PS3 pad used to vibrate during gameplay, usual stuff.
Sadly now my xbox360 pad is not vibrating which is extremely disappointing because I, being a console affictionado, really love the feeling.
I also can't find any option for it in the game!!

Any workarounds for this? I would have rather gotten the PS3 version had I know about this :(

Thanks for your attention
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