let me make it clearer,
i want to blend the left one to the right one, can anyone help me?

thnx for reply, but then how to blend 2 totally different objects? is it possible in Maya?

the base object is a surface
the target object is a mesh that i import from an OBJ file
when i change the blendshape channel key ( to any value other than 0), the object just disappears

and one...