Hi again, all - and a Merry Christmas to you!

I'm using my Xara Designer Pro X10, and liking it - but I've noticed something kind of aggravating...the eraser won't work on Shapes. Say that I draw a circle - I give it a black outline, use the "no color" option as a fill, and then try to erase a bit of the black outline. Well, all that happens is that the eraser shoves the line around a little - but it won't erase it! What's the deal? Does anyone know?