Bezier and Taper problem

Hi, All.

I am having a problem getting the Taper to function properly when I am setting the geometry of my Curve.

I was duplicating a tutorial on using Bezier Curves (CGCookie, I think . . .) and the following problem occured.

I created a Base Curve, a Second Curve, and a Circle.
I sample the Circle to successfully bevel the Base Curve.
I sample the Second Curve to taper the Base Curve and it explodes into a mess.

I have run through the usual fixes such as setting the Normals and Scale and tested many different settings.

The links below lead to, in order, screen shots of the stages.

Thanks, in advance for any suggestions.