How to Modify a Simple Spline?

Hey all,

I'm back to Pro/E after a recess on SolidWorks and it seems that somethings changed on modifying sketched spline curves.

If you sketch a simple two-point spline curve between two line segments, you typically make the spline tangent to each line segment to produce a smooth spline curve. Then, to modify the look of the curve, you right-click the spline, pick "modify", then click the button that says modify the spline by control points. This makes the little polygon that allows you to drag around the shape of the spline while keeping tangency to the line segments on each end. Or, at least this is how it used to work.

What I'm faced with now is the inability to click the "modify control points" button if I have any tangency constraints or other dimensions on the spline curve. It the spline curve is free, the button is clickable and I can drag around the control points. Further, if I make the spline tangent, then delete my tangency constraints, the control points seem to be modifiable and keep their tangency as they should (the control points only move along lines coincident with the end line segments). But, when I exit out of the modification tab, I have to reapply my tangent constraints. Usually to set up curves for boundary surfaces it a lot of playing with the end line segment to "aim" the spline, and using the "modify" tab to influence the spline to get the shape you want.

I feel like I'm going crazy, because this is a fundamental tool in surfacing that I've used for years. Something must have changed in the past couple releases. Say, in SolidWorks, if you set up the same sketch, little arrows automatically appear on the ends of the spline curve that you can pull around to influence the shape.

Thanks for any help! I feel like I'm really close, but I'm missing something here...