Do you let your moisturizer absorb before you apply concealer? If not the moisturizer might make your eyelids oily and cause the concealer to crease. Try letting the moisturizer sink in for 5-10 mins before applying concealer. If it still creases it's probably due to oily lids. I have oily lids and i use MAC paints (bare canvas) and it works great alone or as primer under eyeshadow to prevent creasing.