surface blending?

 From:  dooki
Hey all,

I'm trying to blend two surfaces.
- I selected the edges of each surface and Joined them to make them "one path." So I now have two paths, one for each surface.
- I use the Blend tool and it asks to select and edge. I do. I end up with ONLY the preview of the blend curve. (Normally I would see a preview of the blend surface.)
- When I validate I am left with the created blend curve and no blend surface.
- ALSO, I play with the blend slider but it looks like the blend it NOT tangent to either surface.

Q: What am I doing wrong?
Q: Is there a surface to surface blend option?

Much thanks,