Stretch To Constraint

For my new model I have a fix point and a movable target, that I want to connect with a cylinder (think rope). I think that would be a classic case for the stretchTo constraint. So I set up a test environment to figure out how I have to set up my scene so it works correctly.

Naturally only setting the target to left or right (both on the Y axis) has any effect. What I do not understand is that it seems that any size of the mesh in direction X and Z is collapsed. Though the size in direction Y stays the same, The value in “Rest Length” is what is expected.
Has anyone any idea why that is and what to do to make the cube stretch to the empty?



DirectionSetup.blend (507 KB)