Help connecting xbox controller to acer a500?

[AlphasInsanity]

So I have a joy tech wired Xbox 360 controller and I been reading around where people just been plugging it in and it works no apps/drivers ect. Can't seem to get it to work I put it in the USB slot and the four lights just blink .
Is their an app I download or do I have to buy this OTG host cable I been seeing.