The rasp I use is a Brazilian made one you pick up from Oracheln.l, so I’d guess it’s a similar one. I put some weight into the coarse side of mine to get it to cut, but when it does it’s more like little chunks of wood as opposed to normal rasping dust. Try a bit more pressure and swipe it across the grain at a 45* angle. I feel like I can go at it more controlled and get more pressure if I draw the rasp towards me to cut.
Kyle