CompuServe Messages

I'm having a problem in A:M Sculpture. I am attempting to create a corkscrew- like segment (or for a more 'character'-like metaphor – a pig's tail). I am attempting to use the Extrude along a spline feature by creating a control spline that creates the corkscrew path, and then use a circular 4 point sline as a cross section. The extrusion creates the corkscrew, but a certain control points along the control spline the splines created to connect the cross sections get twisted, ie rotated about the control spline, so that the segment narrows to a point and then expands back out to the full cross sectional radius at the next control spline control point. How can I control this so that the radius of the segment is constant throughout? BTW, I've tried a cross sectional spline of 8 control points and that didn't seem to help. Of course, TIA for any and all help! Chris L. Rudolphi