Regarding static orientation

[mydayz]

   
I am using Generator as the attached screen shot.
My problem is that
1. I added several CP into the spline path. It is just the line. Some of them are rotated along Z-axis.
2. I expected that Shape of mesh would be twisted by. the spline path.
3. However the result as the attached screen shot was not what I expected.
4. Using spline.GetOrientation(tf), I get the correct the rotation.
5. But the mesh is not.

I am using static orientation for the spline path. The orientation is following correctly along my CPs. But the shape of mesh does not following that orientation.
Please let me know what I missed.