Why won't my bread machine knead?

My mother had a similar bread machine and like yours, suddenly stopped kneading. With ours the machine part just wore out and we ended up getting a new one. I'm not sure how expensive the one you have is but ours was a medium ranged priced and lasted a little over a year. My best guess is that the machine is broken. Sad to say but they don't seem to last very long. :( Sorry!