Hello;

     Having a problem, with sketch line disappearing; for instance i'm trying to add some constraints; when i pick a radius, & then hold the control key down, the sketch of the radius portion disappears. Quite frustrating, & I don't know why it's happening, but wondering if any one knows anything about this, & what i could posible do.          

     Thks for any info. in advance.

                rob_d(2009 sp4)