mariasaurio

Hi, I'm having a problem animating a character with IK. I'm making an idle loop, so I'm using IK to have the body bob up and down without the feet moving. However, it's not working as it should. On the first frame, I lower the body a little and the feet don't move. Then I make a new keyframe by dragging the body up and the feet remain in place. However, when I hit play, the anchors move inbetween keyframes! How can I fix this?