I've followed the instructions in the manual perfectly. I press go (once) and it just moves the point I selected to a point on the segment I selected (e.g. I draw a circle, it gives me a point "b" and a center "a"), and stays there. It doesn't animate at all. The four pixels in the corner that mean it's doing something are on though. Any idea on how to fix this? Could it be a lack of memory?