Used Kitchenaid I Just Recently Acquired A Kitchenaid Stand Mixer, Before I Had A Sunbeam.?

I just recently acquired a Kitchenaid stand mixer, before I had a Sunbeam.? - used kitchenaid

When I have to use my Kitchenaid to appear more like cake, my glazes sandy or too soft, which is not the same blend of everything, with the KitchenAid. What am I doing wrong?