Hello, I am trying to train my rotator cuff external rotation like this(I am not the guy at the picture).:

img385.imageshack.us/img385/6144/externalba9.jpg

I can feel it in my right shoulder, but when I am doing it with my left shoulder I feel it more in my biceps. Do you guys have any tips for me? I have tried doing the left one as much like the right as I can, but I still only feel it in the biceps, and not in the shoulder.

Thomas